Definition of Lowell, Percival in English:

Lowell, Percival

proper noun

  • (1855–1916), American astronomer. Lowell inferred the existence of a ninth planet beyond Neptune, and when it was eventually discovered in 1930 it was given the name Pluto, with a symbol that also included his initials. He was the brother of Amy Lowell.


Lowell, Percival