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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