- The bivalent hydrocarbon radical C2H4 that is isomeric to the ethylene radical.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for ethylidene
Ethylenediamine forms a platinochloride almost insoluble in hot water, while the ethylidene salt is more easily soluble.Poisons: Their Effects and Detection
Alexander Wynter Blyth