say it: ab-DOH-muhn
abdomen is a noun meaning "the region of the body of a vertebrate between the thorax and the pelvis". It carries 2 recorded senses.
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
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for abdomen come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.