/ Dictionary / Index A abdomen: Meaning and Definition of Find definitions for: ab•do•men Pronunciation: (ab'du-mun, ab-dō'-), [key] — n. the part of the body of a mammal between the thorax and the pelvis; belly. the cavity of this part of the body containing the stomach, intestines, etc. (in nonmammalian vertebrates) a region of the body corresponding to, but not coincident with, this part or cavity. the posterior section of the body of an arthropod, behind the thorax or the cephalothorax. See diag. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: abdomen (Thesaurus) abdom abdominal 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