Also spelled meso-thorax
noun
Meanings
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1
noun
the middle of the three segments of an insect's thorax, bearing the second pair of legs and, when present, the forewings
The beetle's stridulatory rasp lay on the mesothorax beneath the wing covers.
Thesaurus
Etymology
Formed from meso-, 'middle,' + thorax. Entomologists divide the insect thorax into the prothorax, mesothorax, and metathorax; the name identifies the middle segment.