-diene

n combining form

denoting an organic compound containing two double bonds between carbon atomsbutadiene

Word Origin for -diene

from di- 1 + -ene

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012