Wordnet 3.0
NOUN (1)
1. 
 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); 
[syn: Galileo, Galileo Galilei]
WordNet (r) 3.0 (2006):
Galileo Galilei
    n 1: 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) [syn: Galileo, Galileo Galilei]