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umbelliferone 傘形酮 傘形酮 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 {Umbelliferae}, as galbanum, asafetida, etc. It is analogous to coumarin. Called also {hydroxy-coumarin}. Its strong fluorescence under ultraviolet light makes it useful in analytical biochemistry, as, for example, to detect phosphatase activity by hydrolysis of umbelliferyl phosphate. [1913 Webster PJC]
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