(1906–97), American astronomer. His chief discovery was that of Pluto on 13 March 1930, which he made from the Lowell Observatory in Arizona. Tombaugh subsequently discovered numerous asteroids.
Definition of Tombaugh, Clyde William in US English:
Tombaugh, Clyde William
proper nounˈtämˌbô
(1906–97), US astronomer. He discovered Pluto on March 13, 1930, and subsequently discovered numerous asteroids.