Umbelliferone
Pronunciation : Um`bel*lif"er*one
Part of Speech : n.
Definition : Defn: A tasteless white crystalline substance, C9H6O3, found in the bark of a certain plant (Daphne Mezereum), and also obtained by the distillation of certain gums from the Umbellifer?, as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy- coumarin.
(Chem.)
Source : Webster's Unabridged Dictionary, 1913