1. [syn: navel, umbilicus, bellybutton, belly button, omphalos, omphalus]
The Collaborative International Dictionary of English v.0.48:
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.
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.
(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
(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.
WordNet (r) 3.0 (2006):
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" [syn: navel, umbilicus,
bellybutton, belly button, omphalos, omphalus]
Moby Thesaurus II by Grady Ward, 1.0:
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