مسرد R

تتمة المصطلحات في مقال المعجم العلمي

مصطلحات A - I	مصطلحات J - R	مصطلحات S - Z
A B C D E F G H I	J K L M N O P Q R	S T U V W X Y Z

• r-meson ميزون- R ، Meson ، قائمة الميزونات ، -ع ، يوجد قالب:الجسيمات في الفيزياء

• r-meter

• rabbit

• rabbit

• rabbit coop

• rabbit hutch

• rabbit system

• rabies, hydrophobia

• rabit"(pneumatically operated sample tube)

• race

• racemation

• raceme inflorescence

• racemic compound

• racemic mixture

• racemization

• racemize; to

• racemos

• rachilla

• rachis

• rack

• rack

• rack panel

• racking

• rad (unit of absorbed energy)

• radappertisation

• radar

• radar altimeter

• radar altitude

• radar antenna

• radar astronomy

• radar beam

• radar chart

• radar coverage

• radar horizon

• radar jumming

• radar meteorology

• radar paint

• radar pulse

• radar range

• radar scanning

• radar shadow

• radar station

• radar tracking

• radial

• radial beam tube

• radial diffusion

• radial dimenson

• radial distribution

• radial force

• radial modulation

• radial node

• radial oscillation

• radial peak flux

• radial position

• radial stress

• radial symmetry

• radial system

• radial velocity

• radially bare

• radian

• radiance

• radiant

• radiant density

• radiant efficiency

• radiant energy

• radiant flux

• radiant heating

• radiant intensity

• radiate, to

• radiated

• radiated power

• radiating heat

• radiating scattering

• radiating umble inflorescence

• radiation

• radiation background

• radiation beam

• radiation counter (survey meter)

• radiation counter tube

• radiation curing

• radiation damage

• radiation damping

• radiation death

• radiation density

• radiation dosage (radiation dose)

• radiation dosimetry

• radiation effect

• radiation energy

• radiation equilibrium

• radiation exposure

• radiation field

• radiation flux

• radiation genetics

• radiation hardening

• radiation hazard

• radiation heating

• radiation history

• radiation immobilization

• radiation indicator

• radiation injury

• radiation intensity

• radiation istry

• radiation length

• radiation level

• radiation loss

• radiation measure-ment

• radiation micro-ogy

• radiation monitor-ing

• radiation oncology

• radiation physics

• radiation power density

• radiation pressure

• radiation processing

• radiation protection

• radiation protection advisor team

• radiation protection guide

• radiation rate

• radiation resistance

• radiation safety

• radiation sensitive

• radiation shielding

• radiation sickness

• radiation source

• radiation standards

• radiation sterilization

• radiation sterilization dose

• radiation syndrome

• radiation therapy

• radiation width

• radiation-attenuated vaccine

• radiation-induced deleterious recessive mutation

• radiation-induced embrittlement

• radiation-induced genetic defect

• radiation-induced immobilization techniques

• radiation-induced mutation

• radiation-induced polymerization

• radiationless decay

• radiationless transition

• radiative capture

• radiative capture cross section

• radiative capture of neutrons (by uranium)

• radiative cascade

• radiative cooling

• radiative decay

• radiative equilibrium

• radiative recombina- tion (of ions)

• radiative transition

• radiator

• radical

• radicidation

• radicle

• radio galaxies

• radio noise

• radio protection

• radio telescope

• radio-

• radio-frequency-induced evaporation

• radio-induced mutation

• radio-thin layer

• radioacoustic

• radioacoustics

• radioactinium

• radioactivation analysis

• radioactive

• radioactive aerosol

• radioactive airborne particles

• radioactive barium

• radioactive byproduct

• radioactive carbon

• radioactive chain

• radioactive chemistry

• radioactive constant

• radioactive constant; transformation constant

• radioactive contamination

• radioactive dating

• radioactive decay

• radioactive decay product

• radioactive deposit

• radioactive disintegration

• radioactive dust

• radioactive effluent

• radioactive element

• radioactive equilibrium

• radioactive fall-out

• radioactive family

• radioactive fission product

• radioactive gas

• radioactive half-life

• radioactive heat

• radioactive indicator

• radioactive indium

• radioactive iodine

• radioactive material

• radioactive nucleus

• radioactive nuclide

• radioactive poison

• radioactive precursor

• radioactive radiation

• radioactive recoil

• radioactive relationship

• radioactive series

• radioactive standard

• radioactive steam

• radioactive tracer

• radioactive waste

• radioactive wastes

• radioactive water

• radioactive zone

• radioactively labelled

• radioactivity

• radioactivity level

• radioagronomy

• radioagronomy section

• radioastronomy

• radioautograph

• radiobilogical effect

• radiobiological action

• radiocarbon dating

• radiochemical

• radiochemical- separation procedure

• radiochemistry

• radiochromato-graphy

• radiochronology

• radiocolloid

• radiodisinfestation

• radioecho

• radioecology

• radioecology

• radioelement

• radiofrequency

• radiofrequency amplifier

• radiofrequency component

• radiofrequency filter

• radiofrequency oscillator

• radiofrequency radiation

• radiofrequency spectrum

• radiogalaxy

• radiogenic

• radiogenic heat

• radiogenic isotope

• radiograph

• radiographic

• radiographic inspection

• radiography

• radioical anal

• radioical assay

• radioical neutron activation analysis

• radioical process

• radioimmoassay

• radioimmuno- scintgraphy

• radioimmunoassay

• radioimmunotherapy

• radioinduction

• radioisotope

• radioisotope batteries

• radioisotope generators

• radioisotope migration

• radioisotope scanning

• radioisotope-labelled drugs

• radiolabel

• radiolabelling

• radiological

• radiological hazards

• radiological monitoring

• radiological protection

• radiologist

• radiology

• radioluminescence

• radioluminous

• radiolysis

• radiometer

• radiometric

• radiometric analysis

• radiometric halos

• radiometric quantity

• radiometric survey

• radiometry

• radiomimetic

• radiomutation

• radionuclide

• radionuclide inputs

• radionuclide outputs

• radioogy

• radiopasteurization

• radiopharmaceutic

• radiopharmaceutical

• radiopropagation

• radioresistance

• radioresonance method

• radioscopy

• radiosensitivity

• radiosensitizer

• radiosource

• radiosterilization

• radiosurgery

• radiotelemetry

• radioteletype

• radiotherapy

• radiothorium

• radiotoxicity

• radiotoxology

• radiotracer

• radiowave

• radiowave radiation

• radish

• radium (ra)

• radium beryllium source of neutrons

• radium emanation

• radius (radii)

• radius of action

• radius of curvature

• radius of gyration (radius of inertia)

• radome

• radon (rn)

• radon concentration

• radon daughters

• radon detector

• radon technique

• radurization

• radwastes = radiowastes

• raffinase

• raffinate

• raffinate layer

• raft

• ragged feathers

• railway

• rain

• rain-fed area

• rain-tight

• rainbow scattering

• rainfall

• rainmaking

• raise (v)

• raisin

• rake

• raking

• ram

• ram (random access memory)

• ram (random access memory)

• raman

• raman effect

• raman scattering

• raman spectroscopy

• ramification

• ramming

• ramos

• ramp generator

• rana

• rancid

• rancid oil

• rancidity

• randite

• random

• random access memory

• random access memory(ram)

• random coincidence

• random distribution

• random electrostatic field

• random encounter

• random genetic

• random medium

• random motion

• random noise

• random process

• random sample

• random scattering

• random selection

• random sequence

• random storage

• random walk

• randomization

• randomized complete block design

• randomness

• raney nickel

• range

• range control

• range deviation

• range estimation

• range finder

• range of action

• range of neutron velocity

• range of nuclear force

• range of particle

• range of visibility

• range straggling

• range-energy relation

• rangeland

• ranger

• rank

• rape

• rape oil

• rape seed oil

• rapeseed meal

• rapid analysis

• rapid process

• raptor

• rare gas

• rare isotope

• rare metal

• rare- earth chelates

• rare-earth

• rare-earth elements

• rarefaction

• rarefaction wave

• rarefied

• rarefied gas

• rash

• raspberry

• raster

• raster pattern

• raster scanning

• rat

• ratchet

• ratchet voltage

• rate

• rate limiting step

• rate of approach

• rate of change

• rate of decrease

• rate of diffusion

• rate of discharge

• rate of discharge of electroscope

• rate of disintegration

• rate of energy gain

• rate of firing

• rate of formation

• rate of growth

• rate of ical reaction

• rate of increase

• rate of occurence

• rate of power generation

• rate of radioactive decay

• rate of reaction

• rate of withdrawal

• rated capacity

• rated characteristic

• ratemeter

• raticide

• rating

• ratio

• ratio dedector

• ratio meter

• ratio of transformation

• ratio resistor

• rationing

• rations

• rauvite

• ravine

• raw material

• ray

• ray flowers

• ray path

• ray surface

• ray system

• rayleigh scattering

• rayleigh waves

• rayleigh-jeans law

• rayon

• rbe dose (relative biological effectiveness of radiation

• rbs (rutherford back scattering)

• rcic (reactor core isolation cooling) systems

• re-

• re-deposition

• re-form, to

• re-heat regenerative steam cycle

• reabsorbing

• react; to

• reactance

• reactant

• reactants

• reacting fuel

• reacting plasma

• reacting volume

• reaction

• reaction cross section

• reaction energy

• reaction formula

• reaction heat

• reaction mean free path

• reaction mean free time

• reaction of excited molecules

• reaction power

• reaction power density

• reaction product

• reaction rate

• reaction rate parameter

• reaction region

• reaction series

• reaction threshold

• reaction time

• reactivate; to

• reactivation

• reactivator

• reactive

• reactive gauge

• reactive ion etching

• reactive mixture

• reactive nitrogen species

• reactive power

• reactivity

• reactivity calibration

• reactivity coefficient

• reactivity drift

• reactivity meter

• reactivity regulator worth

• reactivity regulator worth

• reactivity temperature coefficient

• reactivity worth

• reactor

• reactor accidents

• reactor block

• reactor channels

• reactor charging machines

• reactor column

• reactor commissioning

• reactor control

• reactor control rate

• reactor control rods

• reactor control theory

• reactor core

• reactor core

• reactor core disruption

• reactor decommissioning

• reactor design

• reactor dismantling

• reactor engineering

• reactor equation

• reactor fuel

• reactor fuel elements

• reactor fueling

• reactor istry

• reactor kinetics

• reactor lattice pitch

• reactor licensing

• reactor loop

• reactor ma

• reactor metallurgy

• reactor operation)

• reactor operators

• reactor period

• reactor pit

• reactor poison

• reactor poison removal

• reactor pressure vessel

• reactor runaway

• reactor safety

• reactor shutdown

• reactor simulators

• reactor sites

• reactor siting

• reactor spectrum

• reactor start-up

• reactor synchroniz-ing

• reactor thermal columns

• reactor trip

• reactor tube

• reactor vessel

• reactor vessel

• read head

• read out

• read screen

• read-out system

• reader

• reading rate

• reagent

• reagent box

• reagent for etching

• real image

• real part (of complex number)

• real time

• real-time processing

• realgar

• realistic

• reap (v)

• reaper

• reaper and binder

• rear wheel

• rearing

• rearrange; to

• rearrangement

• reasoning

• reboiler

• reboiler coil

• recall

• recapture constant

• receive; to

• receiver

• receptacle

• receptacte

• receptive field

• receptor

• recession

• recessive

• recessive character

• recessive lethal matation

• recessive mutaion

• recipient

• reciprocal

• reciprocal cross

• reciprocal lattice

• reciprocal vector

• reciprocity

• reciprocity theorem

• recirculation

• reclaim; to

• reclaimer

• reclaiming

• reclamation

• reclinate leaf

• recognition

• recognition criteria

• recoil

• recoil electron

• recoil nucleus

• recoil proton

• recoil transport

• recoil triton

• recoilless emission

• recombinant dna

• recombination

• recombination coefficient

• recombination region

• recombinations

• recombiner assembly

• recombiner condenser

• recommended dietary allowances

• recondensation

• reconfigurability

• reconnaissance

• reconnaissance survey

• reconstitution

• recorder

• recorder-controller

• recording

• recover; to

• recoverable

• recovered

• recovered oil

• recovery (of a patient)

• recovery ; see also: extraction

• recovery curve

• recovery of uranium

• recovery of waste uranium

• recovery rate

• recovery time

• recrystallization

• recrystallization

• recrystallize; to

• rectal

• rectangle

• rectangular array

• rectangular parallel-epiped

• rectangular projection

• rectangular pulse

• rectangular scanning

• rectangular wave

• rectangular waveguide

• rectification

• rectified

• rectified spirit

• rectifier

• rectify, to

• rectilinear motion

• rectilinear polarisation

• rectum

• rectus

• recuperation

• recurrence

• recurrence relation

• recurrence relation

• recurrent

• recurvate

• recurvature

• recyclage

• recycle

• recycled fuel

• recycling

• red

• red corpuscles

• red-shift

• redhibitory defect

• redhibitory malady

• redistribution

• redox

• redox cell

• redox potential

• reduce; to

• reduced

• reduced enrichment for research and test reator (rertr)

• reduced mass

• reducer

• reducible

• reducing

• reductant

• reductase

• reductibility

• reduction

• reduction activity

• reduction and precipitation

• reduction division

• reduction potentiel

• reduction to thermal velocities

• reductive

• redundancy

• redundant

• redundant

• reduplication of organs

• reed

• reef

• reentrant circuit

• reentrant connection

• referee

• reference

• reference asian man

• reference beam

• reference core

• reference crop

• reference man

• reference material

• reference plant

• reference value

• referential relation

• refilter

• refine; to

• refined

• refined oil

• refined petroleum

• refined product

• refinement

• refinery

• refinery gas

• refining

• refister circuit

• reflect; to

• reflectance

• reflected assembly

• reflected reactor

• reflection

• reflection coefficient

• reflection factor

• reflection law

• reflection of neutron beam

• reflection symmetry (right-left symmetry)

• reflection x-ray fluorescence

• reflectivity

• reflectometer

• reflector

• reflector control

• reflector lattice

• reflector plate

• reflector saving

• reflex

• reflex circuit

• reflexive relation

• reflux

• reflux condenser

• reflux ratio

• refluxing

• reforestation

• reform; to

• reformated

• reformer

• reforming

• refract; to

• refraction

• refraction of neutron beam

• refractive index

• refractivity (molecular)

• refractometer

• refractometry

• refractory

• refractory material

• refrigerant

• refrigerated gas

• refrigerating

• refrigeration

• refrigerator

• refuse

• regelation

• regenerate plutonium

• regenerate; to

• regenerated fuel

• regeneration

• regeneration of neutrons

• regeneration of nuclear fuels

• regeneration of plant

• regenerative

• regenerative cycle

• regenerative process

• regenerative reactor

• regenerator

• regime

• region

• region of limited proportionality

• regional

• regional fuel cycle centres

• regional project

• regiospecific

• regiospecificity

• register

• registered

• registrant

• registration

• regolith

• regression

• regression analysis

• regression equation

• regular

• regularities

• regulated

• regulated power supply

• regulating transformer

• regulation

• regulator

• regulatory activities

• regulatory activities

• regulatory authority

• regulatory practice

• regulatory practice

• regulatory region

• regulatory regions

• regurgitation

• rehabilitation

• reinfection

• reinforce

• reinforced

• reinforcement

• reinsertion

• reject

• rejection

• rejector

• rejector circuit

• rejoining

• rejoining process

• rejuvenation

• relation

• relative

• relative aperture

• relative concentra-tion

• relative energy

• relative intensity of radiation

• relative kinetic energy

• relative neutron flux

• relative ogical effectivness (rbe)

• relative particle energy (in plasma)

• relative plateau slope

• relative position

• relative velocity

• relative volatility

• relativistic heavy ion collider (bnl)

• relativistic mass equation

• relativistic particle

• relativistic range

• relativistic velocity

• relativity

• relaxation

• relaxation energy

• relaxation frequency

• relaxation length

• relaxation time

• relay

• relay cell

• relay sattalite

• relay system

• release

• release (fission product)

• release limits

• release machinery

• release of energy

• release; to

• release; to

• reliability

• reliability of reactor pressure components

• relief

• relief valve

• relocate

• reluctance

• reluctivity

• rem (roentgen equivalent man)

• remainder

• remains

• remanence

• remanent magnetization

• remelting

• remiges

• remission

• remontant

• remote

• remote control

• remote decommis-sioning system

• remote handling equipment

• remote handling equipment

• remote manipulation

• remote sensing

• removable contamination

• removal of nuclear material

• renal calculus

• renal failture

• renal transplant

• renardite

• renegade

• renewable energy sources

• rennet

• renneting

• rennin

• renormalisation

• renovation

• reorientation

• reoxidation

• rep (roentgen equivalent physical)

• repair

• repair dna

• reparation

• repeat operator

• repeated

• repeater

• repeating decimal

• repellent

• repercussion

• reperfusion

• repetition

• repetition rate

• repetitive error

• repetitive garbled segments of dna

• replaceable fuel assemblies

• replacement

• replica

• replica techniques

• replicate

• replication

• replication of dna

• replicative process

• replum

• repolarize

• report

• reporter

• repotting

• representation

• representation theory

• representational signal

• representative

• representative array

• representative sample

• repress; to

• repression

• reprocessing

• reprocessing loss

• reprocessing plant

• reproduce

• reproducer

• reproducible

• reproduction

• reproduction factor

• reproductive rate

• reproductive system

• reptant

• reptile

• repulsion

• repulsive

• repulsive core

• repulsive energy

• repulsive force

• request

• requirement

• rerun tower

• rescattering

• rese & develop-ment (r&d)

• rese laboratory

• rese reactor

• rese reactor data base

• rese reactors

• rese section

• resean

• reseeding

• reserpine

• reserve

• reserve cell

• reservoir

• reset action

• resid

• residence time

• residual

• residual gas

• residual range

• residual reactivity

• residual stresse

• residue

• resin

• resin column

• resin columns

• resinaceous (=resinous)

• resinification

• resinoid

• resinous;

• resist

• resistance

• resistance box

• resistance coupling

• resistance- capacitance oscillator

• resistant

• resisting

• resistive

• resistivity

• resistor

• resistor network

• resolution

• resolution

• resolution limit

• resolve; to

• resolvent

• resolving power

• resolving time

• resonance

• resonance absorption

• resonance breeder

• resonance capture

• resonance contour

• resonance cross section

• resonance energy

• resonance escape probability

• resonance escape probability

• resonance integral

• resonance ionisation spectroscopy

• resonance ionization

• resonance ionization mass spectroscopy

• resonance level

• resonance neutron

• resonance neutron flux

• resonance peak

• resonance poisoning

• resonance reactor

• resonance region

• resonance scattering

• resonance-ionization spectroscopy

• resonant

• resonant absorption of neutrons

• resonant filter array

• resonant ionisation spectrometry

• resonant oscillation

• resonant tunneling

• resonate; to

• resonator

• resorcin

• resorption

• resource

• resource conservation

• resource depletion

• resowing

• respiration

• respiration intensity

• respirator

• respiratory system

• respond

• response

• response functions

• response time

• rest energy

• rest mass

• rest point

• resting stage

• resting voltage

• restoration

• restoring force

• restraining means

• restricted

• restricted rotation

• restriction

• restriction-enzyme

• result

• result in

• resultant

• resultant alpha particle

• resultant nucleus

• resultant of forces

• results & discussion

• retailer

• retainer

• retaining ring

• retard" position

• retardant

• retardation

• retardation capacity

• retarder

• retarding mechanisms

• retarding plate voltage

• retention

• retention coefficient

• retention functions

• retention pen

• retention time

• reticular

• reticular structure

• reticulate

• reticulate nervation

• reticulation

• reticulo-pinnate

• reticulo-rumen cavity

• reticulum

• retina

• retinal blockade

• retinal ganglion cell

• retinal neuron

• retinoblastoma

• retinogeniculate

• retinol

• retort

• retorting

• retreat

• retrieval services

• retro-

• retrofit

• retrograde

• retrograde, to

• retrogression

• retrogressive

• retroreflector

• retroreflector

• retrospection

• retrospective

• retroversion

• retroviral genome

• retting

• return

• retuse leaf

• reunification

• reunion

• reveal

• revelation

• revenue

• reverberation

• reverberatory furnace

• reversal film

• reverse (fault)

• reverse bias

• reverse current

• reverse osmosis (ro)

• reverse osmosis (ro)

• reverse transcription

• reverse-field pinch

• reverse; to

• reversed polarity

• reversibility

• reversibility of the somatic effects

• reversible

• reversible compression

• reversible process

• reversible turbines

• reversing current

• reversion

• reversion of lines (x-ray spectra)

• review

• reviews

• revision

• revivication

• revolution

• revolution counter

• revolving

• rewire

• reworked

• rexforming

• reynolds number

• rhamnus, buckthorn

• rhenium (re)

• rheology

• rheology

• rheopexy

• rheostat

• rheotropism

• rhesus

• rhesus factor

• rheum

• rheumatic

• rheumatic fever

• rheumatism

• rheumatoid arthritis

• rhizobium

• rhizobium

• rhizogen

• rhizoid

• rhizome

• rhizophytes

• rhizopods

• rhodamine

• rhodium (rh)

• rhodochrosite

• rhodonite

• rhombail

• rhombic

• rhombic lattice

• rhombohedral

• rhombohedron

• rhomboid

• rhubarb

• rib

• ribbon

• ribbon structure

• riboflavine; riboflavin

• ribonucleic acid rna

• ribonucleoprotein

• ribonucleotide

• ribonucleotide reductase

• ribose

• ribosomal rna

• ribosome

• ribulose

• rice

• rice blast

• rice hull

• rice moth

• rice straw

• rice weevil

• rich gas

• rich oil

• richardson constant

• ricinoleic acid

• ricinus oil

• ridae

• rider

• ridge(s)

• riemann space

• riemannian

• rift valley

• right angle

• right internal carotid artery

• right section

• right triangle

• right –handed material(rhm)

• right-angle prism

• right-hand rule

• right-handed

• right-polarized electron

• rigid

• rigid body

• rigid frame

• rigidity

• rigor

• rims

• ring

• ring current

• ring geometry

• ring laser

• ring rot

• ring scaler

• ring structure

• ring vortex

• ring worm

• ringing

• rings of saturn

• rinsed

• rinsing

• riometers

• riparian woodland

• ripening

• ripple

• ripple factor

• ripple filter

• ripple marks

• ripple voltage

• rise

• rise time

• risk

• risk factor

• ritz variation method

• road

• road map

• road net

• roast; to

• roaster

• roasting

• robot

• robotics

• robust

• robust

• roche limit

• rock

• rock deformation

• rock matrix

• rock phosphate

• rock salt

• rocket

• rocket fuel

• rocket launcher

• rocket ogive

• rocket-salad

• rocky shores

• rod

• rod drive

• rod lattice

• rod shape

• rod-assembly

• rod-type thermistor

• rodent

• rodenticide

• rodenticide

• roe

• roe deer

• roebuck

• roentgen

• roentgen equivalent

• roentgen rays

• roentgen therapy

• roentgenography

• rogersite

• roll

• roll-front deposit

• roller

• roller bearings

• rolling

• rolling friction

• rom (read only memory)

• romance

• roof

• roof filter

• room temperature

• roost

• rooster

• root

• root mean square velocity

• root mean-square value

• root of an equation

• root-rot

• root-sucker

• rooting

• roots distribution

• rootstock

• rope

• rope halter

• ropy milk

• rose

• rose oil

• rosin

• roster pattern

• rostrate

• rot

• rot

• rotameter

• rotary

• rotary compressor

• rotary drive

• rotary evaporizer

• rotary mower

• rotary plough

• rotary pump

• rotary scraper

• rotary vacuum pump

• rotary valve

• rotating

• rotating crystal method

• rotating crystal method

• rotating feeder

• rotating pump

• rotation

• rotation axis

• rotation group

• rotation moment

• rotation spectrum

• rotation symmetry (of space)

• rotation therapy

• rotational

• rotational band

• rotational energy

• rotational grazing

• rotational level

• rotational motion (rotation)

• rotational spectrum

• rotational stability

• rotational transform (of magn. line of force)

• rotational wave

• rotator

• rotator

• rotatory

• rotatory power

• rotavirus

• rouge

• rough

• rough atomic weight

• roughage

• roughness

• round-bottom flask

• rounding-off

• roup of fowls

• router

• routing card

• row

• row address

• row order

• row signal

• row sowing

• royalty

• rubber (=caoutchouc)

• rubber tubing

• rubbing

• rubble land

• rubidium (rb)

• ruby

• ruby laser

• rule

• rule of eight

• rumen canula

• ruminant

• ruminants

• rumination

• rump

• run off

• runaway

• runaway electron

• runback

• runge

• runner

• rupture

• rural

• rurban

• rust

• rust

• rust prevention

• rust preventive

• rustic

• rustiness

• rusting

• rustproof

• ruthenium (ru)

• rutherford

• rutherford scattering

• rutherfordite

• rutile

• rydberg (ry)

• rydberg atoms

• rydberg constant r

• rydberg states

• rye

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