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The Collaborative International Dictionary
Hexine

Hexine \Hex"ine\, n. [Gr. "e`x six.] (Chem.) A hydrocarbon, C6H10, of the acetylene series, obtained artificially as a colorless, volatile, pungent liquid; -- called also hexoylene.

Wiktionary
hexine

n. (context organic compound English) A hydrocarbon, C6H10, of the acetylene series; hexoylene.