GNU Collaborative International Dictionary of English

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Found 3 definitions

  1.       
    
    Umbilic , n. [From L. umbilicus: cf. F. ombilic. See Navel.]
    1. The navel; the center. [Obs.] “The umbilic of the world.”
      Sir T. Herbert.

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    2. (Geom.) An umbilicus. See Umbilicus, 5 (b).
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  2.       
    
    Umbilic , a. (Anat.) See Umbilical, 1.
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  3.       
    
    Umbilicus , 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.
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    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.

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    3. (Bot.) The hilum.
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    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.
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    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.
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