Available Definitions:
1) n. - A sea god in the service of Neptune who assumed different shapes at will. Hence, one who easily changes his appearance or principles.
2) 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.
3) n. - A changeable protozoan; an amoeba.