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Umbelliferone
- 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.
Umbery
- Of or pertaining to umber; like umber; as, umbery gold.
Umbilicated
- Depressed in the middle, like a navel, as a flower, fruit, or leaf; navel-shaped; having an umbilicus; as, an umbilicated smallpox vesicle. (b) (Bot.) Supported by a stalk at the central point.
Umbilication
- A slight, navel-like depression, or dimpling, of the center of a rounded body; as, the umbilication of a smallpox vesicle; also, the condition of being umbilicated.
Umble Pie
- A pie made of umbles. See To eat humble pie, under Humble.
Umbles
- The entrails and coarser parts of a deer; hence, sometimes, entrails, in general.
Umbonated
- Having a conical or rounded projection or protuberance, like a boss.
Umbraculiferous
- Bearing something like an open umbrella.