/ Dictionary / Index M metathorax: Meaning and Definition of Find definitions for: met•a•tho•rax Pronunciation: (met"u-thôr'aks, -thōr'-), [key] — pl. -tho•rax•es, -tho•ra•ces 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. metathesize metatoluidine Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language