Radioactive

Radioactive can generally describe the property of a substance (or more accurately atomic nuclei) which are unstable and spontaneously Decay (disintegrate) with the release of energy, the energy being either Electromagnetic Radiation , particulate or both. This process may occur in both naturally occurring radioactive material and man made substanc
Found on http://www.ionactive.co.uk/glossary.html

radioactive

[adj] - exhibiting or caused by radioactivity
Found on http://www.webdictionary.co.uk/definition.php?query=radioactive

Radioactive

Possessing the property of radioactivity.
Found on http://www.encyclo.co.uk/local/20474

Radioactive

A material is said to be radioactive if it emits radiation. Radioactive materials have unstable nuclei which have a tendency to decay. It is when a decay occurs that radiation is released from the nucleus. Important related concepts are the activity and half-life of a source
Found on http://www.users.zetnet.co.uk/computing/MainPage/SecDepts/Physics/Resources

radioactive

Substance containing an element which decays.
Found on http://www.shodor.org/UNChem/glossary.html

Radioactive

Something which gives off high energy rays or particles.
Found on http://www.cancerhelp.org.uk/utilities/glossary/index.htm?search=r

Radioactive

Radioactive: Emitting energy waves due to decaying atomic nuclei. Radioactive substances are used in medicine as tracers for diagnosis, and in treatment to kill cancerous cells.
Found on http://www.medterms.com/script/main/art.asp?articlekey=11952

radioactive

Giving off radiation. ... (12 Dec 1998) ...
Found on http://www.mondofacto.com/facts/dictionary?radioactive

radioactive

adjective exhibiting or caused by radioactivity; `radioactive isotope`; `radioactive decay`; `radioactive fallout`
Found on http://wordnetweb.princeton.edu/perl/webwn?s=radioactive

radioactive

(ra″de-o-akĀ“tiv) characterized by radioactivity.
Found on http://www.encyclo.co.uk/local/21001

radioactive

Type: Term Pronunciation: rā′dē-ō-ak′tiv Definitions: 1. Possessing radioactivity. Synonyms: radio-2
Found on http://www.medilexicon.com/medicaldictionary.php?t=74871

Radioactive

Radioactive elements are those of high atomic weight (radium, thorium, uranium etc.) which spontaneously emit alpha, beta or gamma rays.
Found on http://www.probertencyclopaedia.com/browse/GR.HTM

Radioactive

something sending out radiation.
Found on http://www.patientinfo.selcn.nhs.uk/glossary?startswith=R

Radioactive

Substance capable of giving off radiant energy in the form of particles or rays by the spontaneous disintegration of atomic nuclei. Can damage and destroy cells and chromosomal material
Found on http://www.oregontoxics.org/glossary.html

Radioactive

Radioactive can generally describe the property of a substance (or more accurately atomic nuclei) which are unstable and spontaneously Decay (disintegrate) with the release of energy, the energy being either Electromagnetic Radiation , particulate or both. This process may occur in both naturally occurring radioactive material and man made substan.
Found on http://www.ionactive.co.uk/glossary_atoz.html?s=az&t=r

radioactive

Giving off radiation.
Found on http://www.cancer.gov/dictionary?expand=R

radioactive

1) Term given to describe substances that contain atoms whose nuclei are are unstable, which causes the substance to slowly decay and emit radiation. Radioactive minerals usually take an extremely long time to decay if kept in proper settings. 2) (verb) - Emitting alpha, beta, and gamma rays.
Found on http://www.inlandlapidary.com/user_area/glossaryR.asp
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