definition of
thorax

[1] #1 thorax n. the middle region of the body of an arthropod between the head and the abdomen. wn

[2] #2 thorax n. [chest, pectus] the part of the human torso between the neck and the diaphragm or the corresponding part in other vertebrates. wn

[3] #3 thorax n. part of an insect's body that bears the wings and legs. wn