: the part of the body between the thorax and the pelvis
… well-defined reddish lesions that can appear anywhere on the body but most often on the thighs and abdomen … Susan Logan-McCracken
also: 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
Removal of the gallbladder—a pear-shaped sac in the right side of your abdomen—has little adverse effect on digestion. The Mayo Clinic Health Letter
2
: the posterior section of the body behind the thorax in an arthropod
On a nearby table was a … dish of ants that looked familiar except that they had been feeding on peach nectar and the abdomen of each was a large, swollen, translucent sac.The New Yorker
showed us a tiny tattoo on her abdomen, right next to her belly button
Recent Examples on the WebPelvic pain is any type of discomfort that’s felt in your lower abdomen. Kaitlyn Pirie, Good Housekeeping, 24 June 2022 The pain in his lower abdomen had become unbearable. Kyle Neddenriep, The Indianapolis Star, 23 June 2022 Tirso Polanco, a 27-year-old loss prevention officer at the Macy’s store at the mall, was shot in the abdomen and remains hospitalized, police said. From Usa Today Network And Wire Reports, USA TODAY, 26 Aug. 2022 Matar, 24, allegedly stabbed Rushdie at least once in the neck and at least once in the abdomen, state police said. Paul P. Murphy, CNN, 13 Aug. 2022 During a trip to the West Coast, in 1923, Harding complained of pain in his upper abdomen. Robin Wright, The New Yorker, 4 Oct. 2020 Ernst Daniels, 46, a white man, of 2940 L. St., was stabbed in the upper abdomen at 30th and Imperial at 9:30 p.m.San Diego Union-Tribune, 17 Aug. 2020 Brown fired shots, striking Townsend in the abdomen and left arm.oregonlive, 27 July 2022 On Sunday evening at around 6 p.m., a 16-year-old male was shot and killed on the city's South Side after being shot in the abdomen. Adam Sabes, Fox News, 25 July 2022 See More
Word History
Etymology
borrowed from Middle French & Latin; Middle French, borrowed from Latin abdōmen "fat underpart of an animal, belly, paunch," of uncertain origin
Note: Often seen 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.