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Definition of: mesothorax
(mes′ə·thôr′aks, -thō′raks, mē′ sə-) noun Entomol.
The middle one of the three segments of the thorax in insects, bearing the anterior wings and the middle legs.
—mes′o·tho·rac′ic (-thô·ras′ik, -thō·ras′ik) adjective
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