|(used as a nonsense word by children to express approval or to represent the longest word in English.)|
|a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.|
radioisotope ra·di·o·i·so·tope (rā'dē-ō-ī'sə-tōp')
A naturally or artificially produced radioactive isotope.
|radioisotope (rā'dē-ō-ī'sə-tōp') Pronunciation Key
A radioactive isotope of a chemical element. Carbon 14 and radon 222 are examples of naturally occurring radioactive isotopes.