noun Chemistry.

a hydrocarbon containing two or more double bonds, often conjugated.

Origin of polyene

First recorded in 1925–30; poly- + -ene
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British Dictionary definitions for polyene



a chemical compound containing a chain of alternating single and double carbon-carbon bonds
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

polyene in Science



An organic compound containing at least four carbon atoms and at least two double bonds. Numerous naturally occurring plant pigments, such as carotenes, are polyenes.
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