" abdomen "

[Noun]  | "ab*do*men" | \ ˈab-də-mən \

1: the part of the body between the thorax and the pelvis with the exception of the back —called also belly

2: the cavity of the abdomen that is lined by peritoneum, is bounded above by the diaphragm, anteriorly by a wall of muscle and tissue, and posteriorly by the spinal column, is continuous below with the pelvic cavity, and contains many of the visceral organs and especially those involved in digestion (such as the stomach, liver, pancreas, kidneys, and intestines) : abdominal cavity

3: the posterior section of the body behind the thorax in an arthropod

Origin: circa 1541 ;

 Borrowed from Middle French & Latin; Middle French, borrowed from Latin abdōmen "fat underpart of an animal, belly, paunch," of uncertain origin ;

  * Note : Often see:n as a derivative of abdere, "to hide, conceal," i.e., "that which is hidden," based on a nominal ablaut form *dhoh1- from the root *dheh1- "put." However, Latin abdōmen refers primarily to a body part of animals, and more or less humorously of humans; such usage suggests something prominent rather than something concealed, so the derivation looks somewhat unlikely.;

[Noun]  | "abdomen"