One of the mysteries of the English language finally explained.
nounPlural thoraces, Plural thoraxesZoology Anatomy
1The part of the body of a mammal between the neck and the abdomen, including the cavity enclosed by the ribs, breastbone, and dorsal vertebrae, and containing the chief organs of circulation and respiration; the chest.
breast, upper body, body, torso, trunkView synonyms
- ‘A metastatic work-up, including a bone scan and a computed tomographic scan of the thorax and abdomen, was negative.’
- ‘The lungs are contained within the paired pleural cavities in the thorax.’
- ‘Originating at the level of the sixth cervical vertebra, posterior to the cricoid cartilage, the esophagus passes through the thorax slightly to the right and behind the aortic arch and the left main stem bronchus.’
- ‘The scalene muscles as a whole are considered as the intercostal muscles of the thorax, located in the neck.’
- ‘Lesions usually begin on the upper thorax and neck but may spread to the entire body.’
- 1.1 The part of a bird, reptile, amphibian, or fish that corresponds to the human thorax.
- ‘During April to June 2002, each captured adult was restrained on a Plexiglas board with narrow Velcro straps across the bird's thorax and adhesive tape to secure full extension of the wings.’
- ‘All birds have an extensive air sac system in the thorax and abdomen.’
- ‘As the bird lands and decelerates the weight of the pectoralis and sternocoricoideus muscles causes the sternum to swing ventrally, increasing the volume of the thorax.’
- 1.2Entomology The middle section of the body of an insect, between the head and the abdomen, bearing the legs and wings.
- ‘Its limp, still-soft wings of cream and various browns, with touches of pink, were folded over its thorax and abdomen, which were covered with a light down.’
- ‘Upon emergence, adult female wasps were marked individually with small spots of paint on the ventral surface of the thorax between the wings.’
- ‘Internally, the thorax houses the large muscles that control the wings and legs.’
- ‘These spots may be missing, but in all cases there is a small black triangle at the base of the wings near the thorax.’
- ‘Adult Japanese beetles have a metallic green head and thorax with coppery brown wing covers and five tufts of white hair on each side of the abdomen.’
Late Middle English: via Latin from Greek thōrax.
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