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:

• Eliminate Unwanted, Stubborn Belly Fat: Revolutionary CoolSculpting® Procedure Receives FDA Clearance to Treat Abdomen Area - Yahoo Finance
  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'
• Chris Bosh (abdomen) out for Games 5 and 6 - NBC Sports
  Bosh has taken a lot of criticism over the last two years as the weakest of the Heat's Big 3, but is now looking like quite a valuable missing piece as the Heat try to bang down low with the talented front court of the Pacers. It took a monster 40-point ... Read more on this news related to 'Abdomen'
• Austin Jackson: Hopes to Return Tuesday - YAHOO!
  Update: Jackson (abdomen) is hoping to return for the team's three-game series beginning Tuesday against Cleveland, the Detroit Free-Press reports. Recommendation: Jackson hasn't played since exiting Wednesday's game with an abdominal strain, with Don ... Read more on this news related to 'Abdomen'