[ab.do.men] n [MF & L; MF, fr. L] (1615) 1: the part of the body between the thorax and the pelvis; also: the cavity of this part of the trunk containing the chief viscera
2: the posterior section of the body behind the thorax in an arthropod--see insect illustration -- ab.dom.i.nal adj -- ab.dom.i.nal.ly adv