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peristethium
noun
peri·stethi·um
\ˌperəˈstēthēəm, -steth-\
Definition of peristethium
peristethia
\-thēə\: the mesosternum of an insect
From the M-W Editors
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Origin and Etymology of peristethium
New Latin, from peri- + steth- + -ium
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