'Umbilic' definitions:

Definition of 'Umbilic'

From: GCIDE

Umbilic \Um*bil"ic\, n. [From L. umbilicus: cf. F. ombilic. See Navel.]
1. The navel; the center. [Obs.] "The umbilic of the world." --Sir T. Herbert. [1913 Webster]
2. (Geom.) An umbilicus. See Umbilicus, 5 (b) . [1913 Webster]

From: GCIDE

From: GCIDE

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]