ethylene group

American

noun

Chemistry.

the bivalent group, −C 2 H 4 −, derived from ethylene or ethane.

ethylene group British

noun

chem the divalent group, -CH 2 CH 2 -, derived from ethylene

"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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Styrolene Derivatives.—This group contains a benzene and also an ethylene group, being derived from styrolene C6H5�CH:CH2.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" by Various

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