Noun abdomen has 2 senses
  1. abdomen, venter, stomach, belly - the region of the body of a vertebrate between the thorax and the pelvis
    --1 is a kind of body part
    --1 is a part of torso, trunk, body
    --1 has parts:
     abdominal aorta; colic artery, arteria colica; hypochondrium; intestine, bowel, gut; navel, umbilicus, bellybutton, omphalos, omphalus; abdominal, abdominal muscle, ab; abdominal cavity, abdomen; abdominal wall
    --1 has particulars: underbelly, underbody
  2. abdominal cavity, abdomen - the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm
    --2 is a kind of cavity, bodily cavity, cavum
    --2 is a part of abdomen, venter, stomach, belly
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