|See carbon a radioactive isotope of carbon, esp carbon-14|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a fool or simpleton; ninny.|
|radiocarbon (rā'dē-ō-kär'bən) Pronunciation Key
A radioactive isotope of carbon, especially carbon 14. Other radiocarbons include carbon 10, carbon 11, carbon 15, and carbon 16.