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Definition of Galileo Galilei
1. Noun. Italian astronomer and mathematician who was the first to use a telescope to study the stars; demonstrated that different weights descend at the same rate; perfected the refracting telescope that enabled him to make many discoveries (1564-1642).
Exact synonyms: Galileo
Generic synonyms: Astronomer, Stargazer, Uranologist
Derivative terms: Galilean
Generic synonyms: Astronomer, Stargazer, Uranologist
Derivative terms: Galilean