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umbilic    




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]


Umbilic \Um*bil"ic\, a. (Anat.)
See {Umbilical}, 1.
[1913 Webster]


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]


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