▸ noun the part of the body of a vertebrate containing the digestive and reproductive organs; the belly:
pain in the abdomen can be caused by any number of things
the physician applies gentle pressure on the abdomen to turn the baby.
▪ Zoology the hinder part of the body of an arthropod, especially the segments of an insect's body behind the thorax:
the Asian hornet has a dark brown abdomen.
– ORIGIN mid 16th century: from Latin.