nounpl. -·tho′rax·es or -·tho′ra·ces·
the hindmost of the three segments of an insect thorax
Origin of metathoraxModern Latin
nounpl. met·a·tho·rax·es, or met·a·tho·ra·ces
The hindmost of the three divisions of the thorax of an insect, bearing the third pair of legs and the second pair of wings.