Classical Mythology. a sea god, son of Oceanus and Tethys, noted for his ability to assume different forms and to prophesy.
a person or thing that readily changes appearance, character, principles, etc.
plural protei [proh-tee-ahy] /ˈproʊ tiˌaɪ/ (Show IPA). (lowercase) Bacteriology. any of several rod-shaped, aerobic bacteria of the genus Proteus, sometimes found as pathogens in the gastrointestinal and genitourinary tracts of humans.
Proteus Pro·te·us (prō'tē-əs) n. A genus of gram-negative, rod-shaped aerobic bacteria of the family Enterobacteriaceae that includes certain species associated with human enteritis and urinary tract infections.