- (n.) A genus of aquatic eel-shaped amphibians found in caves in Austria. They have permanent external gills as well as lungs. The eyes are small and the legs are weak.
- (n.) A sea god in the service of Neptune who assumed different shapes at will. Hence, one who easily changes his appearance or principles.
- (n.) A changeable protozoan; an amoeba.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). proteus. Retrieved September 21, 2026, from http://smartdefine.org/proteus/definitions/2050211 |
| Chicago | Webster's. 2011. "proteus" http://smartdefine.org/proteus/definitions/2050211 (accessed September 21, 2026). |
| Harvard | Webster's 2011, proteus, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/proteus/definitions/2050211>. |
| MLA | Webster's. "proteus" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/proteus/definitions/2050211> |