Umbilicus meaning

ŭm-bĭl'ĭ-kəs, ŭm'bə-lī'kəs
A small opening or depression similar to a navel, as the hollow at the base of the shell of some gastropod mollusks, one of the openings in the shaft of a feather, or the hilum of a seed.
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A navel-like depression, as the hilum of a seed.
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A small opening or depression similar to a navel, as the hollow at the base of the shell of some gastropod mollusks, one of the openings in the shaft of a feather, or the hilum of a seed.
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(anatomy) Navel.
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(botany) Hilum.
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(zoology) A depression or opening in the center of the base of many spiral shells.
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(zoology) Either of the two apertures in the calamus of a feather.
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(geometry) 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.

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(historical) An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.

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Origin of umbilicus

  • Latin umbilīcus nobh- in Indo-European roots
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Latin umbilÄ«cus (“navel").
    From Wiktionary