| / English Dictionary |
RADIOACTIVITY
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay
Synonyms:
Classified under:
Nouns denoting natural processes
Hypernyms ("radioactivity" is a kind of...):
emission (the release of electrons from parent atoms)
Hyponyms (each of the following is a kind of "radioactivity"):
corpuscular radiation; particulate radiation (a stream of atomic or subatomic particles that may be charged positively (e.g. alpha particles) or negatively (e.g. beta particles) or not at all (e.g. neutrons))
Derivation:
radioactive (exhibiting or caused by radioactivity)
Context examples:
A metric unit of volumetric radioactivity concentration defined as a concentration of a radionuclide with an activity equal to one million becquerels per unit volume equal to one millionth of a liter.
(Megabecquerel per Microliter, NCI Thesaurus)
A unit of radioactivity equal to 10E3 nuclear disintegrations or other nuclear transformations per second, or to 10E3 becquerels.
(Kilobecquerel, NCI Thesaurus)
A metric unit of volumetric radioactivity concentration defined as a concentration of a radionuclide with an activity equal to one billion becquerels per unit volume equal to one millionth of a liter.
(Gigabecquerel per Microliter, NCI Thesaurus)
A unit of radioactivity equal to one millionth of a curie or 37 kilobecquerels, and corresponding to a radioactivity of 37 000 atomic disintegrations per second.
(Microcurie, NCI Thesaurus)
A metric unit of volumetric radioactivity concentration defined as a concentration of a radionuclide with an activity equal to one thousand becquerels per unit volume equal to one millionth of a liter.
(Kilobecquerel per Microliter, NCI Thesaurus)
A unit of radioactivity equal to 10E6 nuclear disintegrations or other nuclear transformations per second, or to 10E6 becquerels.
(Megabecquerel, NCI Thesaurus)
A unit of volumetric radioactivity concentration defined as a concentration of a radionuclide with an activity equal to one millionth of a curie per unit volume equal to one liter.
(Microcurie per Liter, NCI Thesaurus)
They use a special camera that detects radioactivity.
(Nuclear Scans, NIH)
A unit of radioactivity defined as 0.037 atomic disintegrations or other nuclear transformations per second or one trillionth of curie (10E-12 curie).
(Picocurie, NCI Thesaurus)
A unit of radioactivity equal to one billionth of a curie or 37 becquerels, and corresponding to radioactivity of 37 atomic disintegrations per second.
(Nanocurie, NCI Thesaurus)
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