The Collaborative International Dictionary of English v.0.48:

Navel \Na"vel\ (n[=a]"v'l), n. [AS. nafela, fr. nafu nave; akin
   to D. navel, G. nabel, OHG. nabolo, Icel. nafli, Dan. navle,
   Sw. nafle, L. umbilicus, Gr. 'omfalo`s, Skr. n[=a]bh[imac]la.
   [root]260. See Nave hub, and cf. Omphalic, Nombril,
   Umbilical.]
   1. (Anat.) A mark or depression in the middle of the abdomen;
      the umbilicus; called also belly button in humans. See
      Umbilicus.
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   2. The central part or point of anything; the middle.
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            Within the navel of this hideous wood,
            Immured in cypress shades, a sorcerer dwells.
                                                  --Milton.
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   3. (Gun.) An eye on the under side of a carronade for
      securing it to a carriage.
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   Navel gall, a bruise on the top of the chine of the back of
      a horse, behind the saddle. --Johnson.

   Navel point. (Her.) Same as Nombril.
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