- Enter a word for the dictionary definition.
From The Collaborative International Dictionary of English v.0.48:
Valylene \Val"yl*ene\, n. [Valerian + -yl.] (Chem.) A volatile liquid hydrocarbon, C5H6, related to ethylene and acetylene, but possessing the property of unsaturation in the third degree. It is the only known member of a distinct series of compounds. It has a garlic odor. [1913 Webster]