Look up: carbon-14

1. carbon 14
   (14C) Type: Term Pronunciation: kar′bŏn Definitions: 1. A β-emitter with a half-life of 5715 years, widely used as a tracer in studying various aspects of metabolism; naturally occurring 14C, arising from cosmic ray bombardment, is used to date relics containing natural carbonaceous materials.
   Found on http://www.medilexicon.com/medicaldictio
   
   
2. carbon 14
   a radioactive isotope of carbon, having an atomic mass of 14 and a half-life of 5730 years, used as a tracer in cancer and metabolic research.
   Found on http://www.encyclo.co.uk/local/21001
   
   
3. Carbon 14
   An isotope of carbon 12 (containing two more neutrons) that is radioactive and used in carbon dating.
   Found on http://www.chemistry-dictionary.com/defi
   
   
4. carbon-14
   A beta-emitter with a half-life of 5715 years, widely used as a tracer in studying various aspects of metabolism; naturally occurring 14C, arising from cosmic ray bombardment, is used to date relics containing natural carbonaceous materials. ... (05 Mar 2000) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
5. carbon-14
   (from the article `carbon`) ...than all the other elements combined. In 1961 the isotope carbon-12 was selected to replace oxygen as the standard relative to which the atomic ... ...detection device. Iodine-131 has proved effective in locating brain tumours, measuring cardiac output, and determining liver and thyroid activity. ... .....
   Found on http://www.britannica.com/eb/a-z/c/22