1. the region of the body of a vertebrate between the thorax and the pelvis

Similar word(s): belly, stomach, venter

Definition categories: body

2. the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm

Definition categories: body, cavity, cavum

Sentences with abdomen as a noun:

- He was all bent over complaining of pains in the abdomen.