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umbilicus n. 脐,中心 脐,中心 umbilicus n 1: a scar where the umbilical cord was attached; " you were not supposed to show your navel on television"; " they argued whether or not Adam had a navel"; " she had a tattoo just above her bellybutton" [ synonym: { navel}, { umbilicus}, { bellybutton}, { belly button}, { omphalos}, { omphalus}] Umbilicus \ Um` bi* li" cus\, n. [ L. See { Umbilic}.] 1. ( Anat.) The depression, or mark, in the median line of the abdomen, which indicates the point where the umbilical cord separated from the fetus; the navel; the belly button, in humans. [ 1913 Webster] 2. ( Gr. & Rom. Antiq.) An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled. -- Dr. W. Smith. [ 1913 Webster] 3. ( Bot.) The hilum. [ 1913 Webster] 4. ( Zool.) ( a) A depression or opening in the center of the base of many spiral shells. ( b) Either one of the two apertures in the calamus of a feather. [ 1913 Webster] 5. ( Geom.) ( a) One of the foci of an ellipse, or other curve. [ Obs.] ( b) A point of a surface at which the curvatures of the normal sections are all equal to each other. A sphere may be osculatory to the surface in every direction at an umbilicus. Called also { umbilic}. [ 1913 Webster] 24 Moby Thesaurus words for " umbilicus": axis, center, center of action, center of gravity, centroid, centrum, core, dead center, epicenter, heart, hub, kernel, marrow, medulla, metacenter, middle, nave, navel, nub, nucleus, omphalos, pith, pivot, storm center
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