Crotonylene
Pronunciation : Cro*ton"y*lene (kr-tn"-ln)
Part of Speech : n.
Etymology : [Crotonic + acet-ylene.] (Chem.)
Definition : Defn: A colorless, volatile, pungent liquid, C4H6, produced artificially, and regarded as an unsaturated hydrocarbon of the acetylene series, and analogous to crotonic acid.
Source : Webster's Unabridged Dictionary, 1913