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polyene

[pol-ee-een] /ˈpɒl iˌin/
noun, Chemistry
1.
a hydrocarbon containing two or more double bonds, often conjugated.
Origin
1925-1930
1925-30; poly- + -ene
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for polyene

polyene

/ˈpɒlɪˌiːn/
noun
1.
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
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polyene in Science
polyene
  (pŏl'ē-ēn')   
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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