Search Result for "eratosthenes": 
Wordnet 3.0

NOUN (1)

1. Greek mathematician and astronomer who estimated the circumference of the earth and the distances to the Moon and sun (276-194 BC); 



WordNet (r) 3.0 (2006):

Eratosthenes
    n 1: Greek mathematician and astronomer who estimated the
         circumference of the earth and the distances to the Moon
         and sun (276-194 BC)