English definition of Thorax

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Definition of thorax

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Thorax (n.) 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..

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Metathoracic :: Metathoracic (a.) Of or pertaining to the metathorax.

Parapterum :: Parapterum (n.) A special plate situated on the sides of the mesothorax and metathorax of certain insects.

Thoracic :: Thoracic (a.) Of or pertaining to the thorax, or chest..

Arthrostraca :: Arthrostraca (n. pl.) One of the larger divisions of Crustacea, so called because the thorax and abdomen are both segmented; Tetradecapoda. It includes the Amphipoda and Isopoda..

Thorax :: Thorax (n.) 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..

Cucullated :: Cucullated (a.) Having the prothorax elevated so as to form a sort of hood, receiving the head, as in certain insects..

Baenosome :: Baenosome (n.) The thorax of Arthropods.

Mesothorax :: Mesothorax (n.) The middle segment of the thorax in insects. See Illust. of Coleoptera.

Bell Bearer :: Bell bearer () A Brazilian leaf hopper (Bocydium tintinnabuliferum), remarkable for the four bell-shaped appendages of its thorax..

Episternum :: Episternum (n.) One of the lateral pieces next to the sternum in the thorax of insects.

Pneumatograph :: Pneumatograph (n.) An instrument for recording the movements of the thorax or chest wall during respiration; -- also called stethograph.

Alitrunk :: Alitrunk (n.) The segment of the body of an insect to which the wings are attached; the thorax.

Prophragma :: Prophragma (n.) An internal dorsal chitinous process between the first two divisions of the thorax of insects.

Spiracle :: Spiracle (n.) One of the external openings communicating with the air tubes or tracheae of insects, myriapods, and arachnids. They are variable in number, and are usually situated on the sides of the thorax and abdomen, a pair to a segment. These openings are usually elliptical, and capable of being closed. See Illust. under Coleoptera..

Echoscope :: Echoscope (n.) An instrument for intensifying sounds produced by percussion of the thorax.

Truncus :: Truncus (n.) The thorax of an insect. See Trunk, n., 5..

Sphex :: Sphex (n.) Any one of numerous species of sand wasps of the genus Sphex and allied genera. These wasps have the abdomen attached to the thorax by a slender pedicel. See Illust. of Sand wasp, under Sand..

Scutellum :: Scutellum (n.) The third of the four pieces forming the upper part of a thoracic segment of an insect. It follows the scutum, and is followed by the small postscutellum; a scutella. See Thorax..

Haematothorax :: Haematothorax (n.) Same as Hemothorax.

Pneumothorax :: Pneumothorax (n.) A condition in which air or other gas is present in the cavity of the chest; -- called also pneumatothorax.