Learning / 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:

radiation; radioactivity

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)

Credits

 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)