Definitions for umbilicusʌmˈbɪl ɪ kəs, ˌʌm bəˈlaɪ kəs; -ˈbɪl əˌsaɪ, -bəˈlaɪ saɪ
Random House Webster's College Dictionary
um•bil•i•cusʌmˈbɪl ɪ kəs, ˌʌm bəˈlaɪ kəs; -ˈbɪl əˌsaɪ, -bəˈlaɪ saɪ(n.)(pl.)-bil•i•ci
Ref: navel (def. 1). 1
a navellike formation, as the hilum of a seed.
Origin of umbilicus:
1605–15; < L umbilīcus navel
navel, umbilicus, bellybutton, belly button, omphalos, omphalus(noun)
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"
Origin: From umbilicus.
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
an ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled
a depression or opening in the center of the base of many spiral shells
either one of the two apertures in the calamus of a feather
one of foci of an ellipse, or other curve
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
U.S. National Library of Medicine
The pit in the center of the ABDOMINAL WALL marking the point where the UMBILICAL CORD entered in the FETUS.