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Webster 1913 Edition

Ethylidene

E-thyl′i-dene

.

(Chem.)

An unsymmetrical, divalent, hydrocarbon radical,

C2H4

metameric with ethylene but written thus,

CH3.CH=

to distinguish it from the symmetrical ethylene,

CH2=CH2

. Its compounds are derived from aldehyde. Formerly called also

ethidene

.