Noun
The part of the trunk between the neck and the abdomen, containing that part of the body cavity the walls of which are supported by the dorsal vertebrae, the ribs, and the sternum, and which the heart and lungs are situated; the chest.
The middle region of the body of an insect, or that region which bears the legs and wings. It is composed of three united somites, each of which is composed of several distinct parts. See Illust. in Appendix. and Illust. of Coleoptera.
The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix.
A breastplate, cuirass, or corselet; especially, the breastplate worn by the ancient Greeks.
Source: Webster's dictionary"Listen, LISTEN... I agree... with everything... you're carving... on the kitchen table, I do. But do you think maybe this might have something to do with your per-ARGH!"(falls backward as if kicked). That first high kick to the thorax generally does the trick. Dylan Moran
All mosquitoes have slender bodies with three segments: a head, a thorax and an abdomen. Source: Internet
At the hospital doctors attempted to resuscitate Grace but because of the extent of not only her brain injury but injuries to her thorax and a femur fracture they were unable to save her life. Source: Internet
He also demonstrated that a dog could be kept alive with its thorax opened, provided air was pumped in and out of its lungs, and noting the difference between venous and arterial blood. Source: Internet
Furthermore, evidence also suggests that impact injuries to the thorax area highly correlate with the occurrence of a cervical-located syrinx. Source: Internet
In insects, the thorax is separated into different segments. Source: Internet