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omphalo-

before vowels omphal-, word-forming element meaning "navel," from Greek omphalos (see omphalos).

Online Etymology Dictionary, © 2010 Douglas Harper

omphalo- in Medicine

omphalo-

pref.
  1. Umbilicus; navel:omphalectomy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.