ac·​ro·​ster·​nite | \ˌa-krō-ˈstər-ˌnīt\
plural -s

Definition of acrosternite 

: the precostal lip of the sternum of a typical segment of an arthropod

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First Known Use of acrosternite

1935, in the meaning defined above

History and Etymology for acrosternite

acr- + sternite

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