mesothorax

/ˌmɛzəˈθɔːræks/
noun
  1. The middle segment of the thorax in insects, which typically bears the middle pair of legs and the forewings.
    • Scientists study the mesothorax to understand how insects evolved flight.
    • The mesothorax of a grasshopper contains muscles that control its jumping legs.
    • In beetles, the mesothorax is often covered by a hard shell called the elytra.
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