ˌəmˈbelyəˌlōn noun
( -s )
Etymology: International Scientific Vocabulary umbellul- (from New Latin Umbellularia, genus of dicotyledonous trees, from umbellula — diminutive of umbella umbel — + -aria + -one
: an unsaturated oily compound C 10 H 14 O that is derived from the leaves of California laurel and is a ketonic derivative of thujene