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Meaning of mesothorax

mes•o•tho•rax

Pronunciation: (mez"u-thôr'aks, -thōr'-, mes"-, mē"zu-, -su-), [key]
— pl. -tho•rax•es, -tho•ra•ces
  1. the middle segment of the three divisions of the thorax of an insect, bearing the second pair of legs and the first pair of wings.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.