/ Dictionary / Index U umbilicus: Meaning and Definition of Find definitions for: um•bil•i•cus Pronunciation: (um-bil'i-kus, um"bu-lī'kus), [key] — pl. -bil•i•ci the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel. a navellike formation, as the hilum of a seed. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: umbilicus (Thesaurus) umbilication umbiliform Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language