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- English Word Ululation Definition A howling, as of a dog or wolf; a wailing.
- English Word Ulva Definition A genus of thin papery bright green seaweeds including the kinds called sea lettuce.
- English Word Umbe Definition About.
- English Word Umbecast Definition To cast about; to consider; to ponder.
- English Word Umbel Definition A kind of flower cluster in which the flower stalks radiate from a common point, as in the carrot and milkweed. It is simple or compound; in the latter case, each peduncle bears another little umbel, called umbellet, or umbellule.
- English Word Umbellar Definition Of or pertaining to an umbel; having the form of an umbel.
- English Word Umbellate Definition Alt. of Umbellated
- English Word Umbellated Definition Bearing umbels; pertaining to an umbel; umbel-like; as, umbellate plants or flowers.
- English Word Umbellet Definition A small or partial umbel; an umbellule.
- English Word Umbellic Definition Pertaining to, or obtained from, certain umbelliferous plants; as, umbellic acid.
- English Word Umbellifer Definition A plant producing an umbel or umbels.
- English Word Umbelliferone Definition 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.
- English Word Umbelliferous Definition Producing umbels.
- English Word Umbelliferous Definition Of or pertaining to a natural order (Umbelliferae) of plants, of which the parsley, carrot, parsnip, and fennel are well-known examples.
- English Word Umbellularia Definition A genus of deep-sea alcyonaria consisting of a cluster of large flowerlike polyps situated at the summit of a long, slender stem which stands upright in the mud, supported by a bulbous base.
- English Word Umbellule Definition An umbellet.
- English Word Umber Definition An African wading bird (Scopus umbretta) allied to the storks and herons. It is dull dusky brown, and has a large occipital crest. Called also umbrette, umbre, and umber bird.
- English Word Umber Definition To color with umber; to shade or darken; as, to umber over one's face.
- English Word Umber Definition Of or pertaining to umber; resembling umber; olive-brown; dark brown; dark; dusky.
- English Word Umber Definition See Grayling, 1.