any compound, as 1,3-butadiene, CH2=CH−CH=CH2, that contains two double bonds.
Origin of diene
Also called diolefin.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
chem a hydrocarbon that contains two carbon-to-carbon double bonds in its molecules
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