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umbilicus |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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. 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. 3. (Bot.) The hilum. 4. (Zo["o]l.) 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. 5. (Geom.) a One of 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}. From WordNet r 1.6 [wn]: umbilicus n : scar where the umbilical cord was attached [syn: {navel}, {bellybutton}, {omphalos}, {omphalus}]
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