Definitions from Wordnet 2.0

• the region of the body of a vertebrate between the thorax and the pelvis
• the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm

Definitions from Wiktionary

• the region of the body of a vertebrate between the thorax and the pelvis ,
• the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm

The Abdomen is the part of the body that is between the chest and the thigh. It contains (has in it) many organs. Some of the organs in the abdomen are:

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  Welcome relief for millions of men and women dealing with one of the most exercise and diet-resistant problem areas – “belly fat” – as CoolSculpting, developed by ZELTIQ® Aesthetics, Inc. (Nasdaq: ZLTQ - News), a medical technology ... Read more on this news related to 'Abdomen'
• FC Dallas' Brek Shea suspended three games for kicking ball at referee - Sporting News
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  A man was reportedly shot in the abdomen in Norfolk Wednesday night, according to dispatchers. Norfolk dispatchers told WAVY.com they received a call just before 7:30 p.m. about a 27-year-old man who had been shot in the abdomen. Karen Parker-Chesson with ... Read more on this news related to 'Abdomen'