The Collaborative International Dictionary
hydroxy-coumarin
Umbelliferone \Um`bel*lif"er*one\, n. (Chem.) 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[ae], as galbanum, asafetida, etc. It is analogous to coumarin. Called also hydroxy-coumarin.