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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.
Umbelliferous
- adjective - relating to or belonging to plants of the family Umbelliferae
Umbraculiform
- - Having the form of anything that serves to shade, as a tree top, an umbrella, and the like; specifically (Bot.), having the form of an umbrella; umbrella-shaped.
Umbrella Arum
- noun - foul-smelling somewhat fleshy tropical plant of southeastern Asia cultivated for its edible corms or in the greenhouse for its large leaves and showy dark red spathe surrounding a large spadix
Umbrella Bird
- noun - black tropical American bird having a large overhanging crest and long feathered wattle
Umbrella Fern
- noun - large Australasian fern with fanlike repeatedly forked fronds; sometimes placed in genus Gleichenia
Umbrella Pine
- noun - medium-sized 2-needled pine of southern Europe having a spreading crown; widely cultivated for its sweet seeds that resemble almonds
- medium-sized two-needled pine of southern Europe having a spreading crown; widely cultivated for its sweet seeds that resemble almonds
Umbrella Tent
- noun - a small tent with a single supporting pole and radiating metal ribs
Umbrella Tree
- noun - erect evergreen shrub or small tree of Australia and northern Guinea having palmately compound leaves
- erect evergreen shrub or small tree of Australia and northern New Guinea having palmately compound leaves
- small deciduous open-crowned tree of eastern North America having creamy white flowers and large leaves in formations like umbrellas at the ends of branches
- small deciduous tree of eastern North America having creamy white flowers and large leaves in formations like umbrellas at the ends of branches
Umbrellaworts
- noun - a plant of the genus Mirabilis