PEREION

[pe.rei.on] or pe.re.on n [NL, fr. Gk peraion, prp. of peraioun to transport, fr. peraios situated beyond, fr. pera beyond; akin to Gk poros passage--more at fare] (1855): the thorax or the seven metameres comprising the thorax of some crustaceans (as a decapod)