a small planet and the farthest known planet from the sun; has the most elliptical orbit of all the planets; "Pluto was discovered by Clyde Tombaugh in 1930"
(Greek mythology) the god of the underworld in ancient mythology; brother of Zeus and husband of Persephone
the body of members of an organization or group; "they polled their membership"; "they found dissension in their own ranks"; "he joined the ranks of the unemployed"