mesothoracic

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mes·o·tho·rax

M0239400 (mĕz′ə-thôr′ăks′, mĕs′-)n. pl. mes·o·tho·rax·es or mes·o·tho·ra·ces (-thôr′ə-sēz′) The middle of the three divisions of the thorax of an insect, bearing the middle pair of legs and the first pair of wings.
mes′o·tho·rac′ic (-thə-răs′ĭk) adj.