pluto
Plu"to, n. Etym: [L., fr. Gr. (Class. Myth.) Defn: The son of Saturn and Rhea, brother of Jupiter and Neptune; the dark and gloomy god of the Lower World. Pluto monkey (Zoöl.), a long- tailed African monkey (Cercopithecus pluto), having side whiskers. The general color is black, more or less grizzled; the frontal band is white.