P0615800 (prō-thôr′ăks′)n.pl.pro·tho·rax·es or pro·tho·ra·ces(-thôr′ə-sēz′) The anterior division of the thorax of an insect, bearing the first pair of legs.pro′tho·rac′ic(-thə-răs′ĭk) adj.
prothoracic
(ˌprəʊθɔːˈræsɪk) adj (Zoology) relating to an insect's prothorax EncyclopediaSeeprothorax