Umbilicus

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The American Heritage® Dictionary of the English Language, 4th Edition
  • n. See navel.
  • n. Biology 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.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. navel
  • the GNU version of the Collaborative International Dictionary of English
  • n. 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.
  • n. An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.
  • n. The hilum.
  • n.
  • n. A depression or opening in the center of the base of many spiral shells.
  • n. Either one of the two apertures in the calamus of a feather.
  • n.
  • n. One of the foci of an ellipse, or other curve.
  • n. 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.
  • The Century Dictionary and Cyclopedia
  • n. In anatomy and zoology, the more or less nearly central point in the walls of the abdomen where the yolk-bag or umbilical vesicle of the embryo hangs, or where the navel-string or umbilical cord enters the belly; the navel; the omphalos.
  • n. Hence Some navel-like formation; some circumscribed depression or elevation; a sort of button, or a place in which a button might fit: when elevated instead of depressed, oftener called umbo.
  • n. In botany: [capitalized] An old generic name (A. P. de Candolle, 1801) for the navelwort, Cotyledon Umbilicus.
  • n. The part of a seed by which it is attached to the placenta; the hilum. See cut under hilum.
  • n. A depression or an elevation about the center of a given surface.
  • n. In antiquity, an ornamented or painted ball or boss fastened upon each end of the stick on which manuscripts were rolled.
  • n. In geometry, a term used by the older geometers as synonymous with focus; in modern works, a point in a surface through which all lines of curvature pass.
  • n. The raised central boss of a large plateau or dish, often made to fit the hollow foot of the ewer which stands upon it and forms one design with the dish.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. a scar where the umbilical cord was attached
  • Hypernym
    Words that are more generic or abstract
    point   
    Variant
    umbilici    umbilic   
    Synonym
    Words with the same meaning
    omphalos    omphalus   
    Same Context
    Words that are found in similar contexts