Definition of Aristarchus

Noun: Aristarchus  ,er-i'staa(r)-kus [N. Amer], ,a-ri'staa(r)-kus [Brit]

1. An ancient Greek grammarian remembered for his commentary on the Iliad and Odyssey (circa 217-145 BC)
    
2. A bright crater on the Moon

See also:
aristae
aristas