Hypertext Webster Gateway: "Umbelliferone"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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}.
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