thorax

noun, plural tho·rax·es, tho·ra·ces [thawr–uh-seez, thohr-] /ˈθɔr əˌsiz, ˈθoʊr-/.

1. Anatomy. the part of the trunk in humans and higher vertebrates between the neck and the abdomen, containing the cavity, enclosed by the ribs, sternum, and certain vertebrae, in which the heart, lungs, etc., are situated; chest.
2. Zoology. a corresponding part in other animals.
3. (in insects) the portion of the body between the head and the abdomen.

noun plural thoraxes or thoraces (ˈθɔːrəˌsiːz, θɔːˈreɪsiːz)

1. the part of the human body enclosed by the ribs
2. the corresponding part in other vertebrates
3. the part of an insect’s body between the head and abdomen, which bears the wings and legs

n.“chest,” c.1400, from Latin thorax, from Greek thorax (genitive thorakos) “breastplate, chest,” of unknown origin. n. pl. tho•rax•es

1. The part of the human body between the neck and the diaphragm, partially encased by the ribs and containing the heart and lungs; the chest.
2. A part in other vertebrates that corresponds to the human thorax.
3. The second or middle region of the body of an arthropod, between the head and the abdomen, in insects bearing the legs and wings.

Plural thoraxes thoraces (thôr′ə-sēz′)

1. The upper part of the trunk in vertebrate animals. The thorax includes the rib cage, which encloses the heart and lungs. In mammals, the thorax lies above the abdomen and below the neck.
2. The middle division of the body of an insect, to which the wings and legs are attached. The thorax lies between the head and the abdomen.

The part of the body between the neck and diaphragm; the chest.