— mesothoracic /mez'euh thaw ras"ik, -thoh-, mes'-, mee'zeuh-, -seuh-/ , adj.
/mez'euh thawr"aks, -thohr"-, mes'-, mee'zeuh-, -seuh-/ , n. , pl. mesothoraxes, mesothoraces /-thawr"euh seez', -thohr"-/ .
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.
[ 1820-30; MESO- + THORAX ]