[ab-duh-muh n, ab-doh-]
See more synonyms for abdomen on Thesaurus.com
  1. Anatomy, Zoology.
    1. the part of the body of a mammal between the thorax and the pelvis; belly.
    2. the cavity of this part of the body containing the stomach, intestines, etc.
    3. (in nonmammalian vertebrates) a region of the body corresponding to, but not coincident with, this part or cavity.
  2. Entomology. the posterior section of the body of an arthropod, behind the thorax or the cephalothorax.

Origin of abdomen

1535–45; (< Middle French) < Latin abdōmen belly
Related formspost·ab·do·men, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for abdomen


  1. the region of the body of a vertebrate that contains the viscera other than the heart and lungs. In mammals it is separated from the thorax by the diaphragm
  2. the front or surface of this region; bellyRelated adjective: coeliac
  3. (in arthropods) the posterior part of the body behind the thorax, consisting of up to ten similar segments
Derived Formsabdominal (æbˈdɒmɪnəl), adjectiveabdominally, adverb

Word Origin for abdomen

C16: from Latin; origin obscure
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for abdomen

1540s, "belly fat," from Latin abdomen "belly," of unknown origin, perhaps from abdere "conceal," with a sense of "concealment of the viscera," or else "what is concealed" by proper dress. De Vaan, however, finds this derivation "unfounded." Purely anatomical sense is from 1610s. Zoological sense of "posterior division of the bodies of arthropods" first recorded 1788.

Online Etymology Dictionary, © 2010 Douglas Harper

abdomen in Medicine


[ăbdə-mən, ăb-dōmən]
  1. The part of the body that lies between the chest and the pelvis and encloses the stomach, intestines, liver, spleen, and pancreas.belly venter
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

abdomen in Science


  1. In vertebrates, the portion of the body between the thorax and pelvis, containing the stomach, intestines, liver, and other organs. In mammals, the abdomen is separated from the thorax by the diaphragm.
  2. In arthropods, the last, most posterior segment of the body.
Related formsabdominal adjective (ăb-dŏmə-nəl)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

abdomen in Culture


[(ab-duh-muhn, ab-doh-muhn)]

The part of the body between the thorax (chest) and pelvis that encloses the organs of the abdominal cavity; the belly.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.