ˈnōpəˌnēn noun
( -s )
Etymology: International Scientific Vocabulary nopin- (as in nopinic acid C 10 H 16 O 3 ) (probably anagram of pinon- — in pinonic acid ) + -ene — more at pinonic acid
: a terpene C 10 H 16 associated with alpha-pinene in turpentine oils and hyssop oil : a liquid bicyclic terpene that is usually levorotatory in its natural oils and that isomerizes to alpha-pinene (as on heating) — called also beta-pinene, 2(10)-pinene