Thorax

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 459

tho'raks, n. (Anat.) The portion of the trunk between the neck and abdomen: the chest. (Entoin.) The 2d general segment of insects. — Thoracic, -raslk, a. Of, or pert, to, the thorax or breast.