Wordnet 3.0
NOUN (1)
1. 
 any of a class of organic compounds containing the cyano radical -CN; 
[syn: nitrile, nitril, cyanide]
WordNet (r) 3.0 (2006):
nitril
    n 1: any of a class of organic compounds containing the cyano
         radical -CN [syn: nitrile, nitril, cyanide]