Word Study
valylene
CIDE DICTIONARY
valylene, n. [Valerian + -yl.].
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]
For further exploring for "valylene" in Webster Dictionary Online