prothorax

noun
pro·​tho·​rax | \(ˌ)prō-ˈthȯr-ˌaks \

Definition of prothorax 

: the anterior segment of the thorax of an insect — see insect illustration

First Known Use of prothorax

1826, in the meaning defined above

History and Etymology for prothorax

New Latin prothorac-, prothorax, from pro- entry 1 + thorax

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The first known use of prothorax was in 1826

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