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Meaning of metathorax

met•a•tho•rax

Pronunciation: (met"u-thôr'aks, -thōr'-), [key]
— pl. -tho•rax•es, -tho•ra•ces
  1. the posterior division of the thorax of an insect, bearing the third pair of legs and the second pair of wings.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.