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English definition of “thorax”

thorax

noun [C] uk   /ˈθɔː.ræks/ us    /ˈθɔːr.æks/ (plural thoraces   /ˈθɔː.rə.sɪːz/   or thoraxes) specialized
anatomy in humans and animals, the middle part of the body below the neck and above the waist biology in insects, the middle part of the body, between the head and the abdomen (= end part)
(Definition of thorax from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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