torace Noun, n, torace (anatomy) thorax (the region of the mammalian body between the neck and abdomen) (entomology, and, arachnology) thorax (the middle of three distinct divisions in an insect, crustacean or arachnid body) Appox. usage (any sense): 1.65 per million words Appox. usage (any sense): 1.65 per million words