Prōteus (disyl.), eī, acc. ea, voc. eu, m, *prwteu/s, a sea-god of changeable form, V., H., O.: Protei columnae, i. e. the boundary of Egypt, V.: Quo teneam voltūs mutantem Protea modo? i. e. How bind one so fickle! H.: Effugiet haec vincula Proteus, i. e. the cunning rogue, H.