rādiolaˈbelled adjective

Labelled (qv) with a radioactive substance

rādiolocāˈtion noun

1. Position-finding by radio signals
2. Radar

rādiologˈic or rādiologˈical adjective

rādiologˈically adverb

rādiolˈogist noun

A doctor specializing in the use of X-rays and in methods of imaging the internal structure of the body for diagnosis and treatment of disease (now often called a radiation oncologist)

rādiolˈogy noun

The study of radioactivity and radiation or their application to medicine, eg as X-rays, or as treatment for certain diseases

rādioluˈcent adjective

Transparent to electromagnetic radiation

rādioluminescˈence noun

Luminous radiation arising from radiation from a radioactive material

rādiolˈysis noun

Chemical decomposition induced by ionizing radiation

rādiolytˈic adjective

rādiometeorˈograph noun same as radiosonde below

rādiomˈeter noun

Any instrument that measures radiant energy

rādiometˈric adjective

(radiometric age the radiometrically determined age of a fossil, mineral, rock, event, etc, usu given in years (also absolute age); radiometric dating the method of obtaining a geological age by measuring the relative abundance of radioactive parent and daughter isotopes in geological materials)

rādiometˈrically adverb

rādiomˈetry noun

rādiomimetˈic adjective

(of drugs) imitating the physiological action of X-rays

rādionˈics singular noun

Diagnosis and treatment at a distance on radiesthetic principles, using a device that tunes in to radiations from samples of hair, nail clippings, etc

rādionūˈclide noun

Any radioactive atom of an element identified by the number of neutrons and protons in its nucleus, and its energy state (radionuclide imaging (radiology) the use of radionuclides to image the physiology or anatomy of the body)

rāˈdiopager noun

A radio receiver which functions as a pager

rāˈdiopaging noun

rādiopaque /-pākˈ/ adjective

Opaque to radiation (esp X-rays)

rāˈdiophōne noun

1. An instrument for producing sound by radiant energy
2. A radiotelephone

rādiophonic /-fonˈik/ adjective

1. (of music) produced electronically
2. Producing electronic music

rādiophonˈics singular noun

rādiophonist /-ofˈə-nist/ noun

rādiophˈony noun

rādioresistˈant adjective

Able to withstand considerable radiation doses without injury

rāˈdioscope noun

A machine used in rādiosˈcopy, examination by X-rays, etc

rādioscopic /-skopˈik/ adjective

rādioscopˈically adverb

rādiosenˈsitive adjective

Quickly injured or changed by radiation

rādiosenˈsitize or rādiosenˈsitise transitive verb

To make (eg cancer cells) more radiosensitive

rāˈdiosonde noun

(Fr sonde plummet, probe) an apparatus for ascertaining atmospheric conditions at great heights, consisting of a hydrogen-filled balloon, radio transmitter(s), etc (also rādiometeorˈograph)

rādio-stronˈtium noun

A radioactive isotope of strontium, esp strontium-90

rādiotelˈegram noun

rādiotelˈegraph noun

rādiotelegˈraphy noun

rādiotelemˈeter noun see under telemeter

rādiotelˈephone noun

A device which receives and transmits by means of radio waves (rather than wires) and which functions as a telephone (eg in cars and other vehicles)

rādiotelephˈony noun

rādiotelˈetype noun

A teleprinter that receives and transmits by radio

rādiother'apy or rādiotherapeutˈics noun

Treatment of disease, esp cancer, by radiation, eg by X-rays, etc

rādiotherˈapist noun

rādiotoxˈic adjective

Of or relating to the toxic effects of radiation or radioactive material