ethylidene
/ɪˈθɪlɪdiːn/ /ɪˈθʌɪlɪdiːn/(also aethyliden) Chemistry
noun
The divalent hydrocarbon radical CHCH3. Usually attributive or a formative element in chemical names.
Origin
Mid 19th century; earliest use found in Henry Watts (1815–1884), chemist. From (i) German Äthyliden.