Aristarchus

[ ar-uh-stahr-kuh s ]
/ ˌær əˈstɑr kəs /

noun

of Samos.late 3rd century b.c., Greek astronomer.
of Samothrace.c216–144 b.c., Greek philologist and critic.
an extremely bright crater in the second quadrant of the face of the moon: about 29 miles (47 km) in diameter from crest to crest.

Example sentences from the Web for aristarchus

British Dictionary definitions for aristarchus

Aristarchus
/ (ˌærɪˈstɑːkəs) /

noun

a crater in the NE quadrant of the moon, having a diameter of about 37 kilometres, which is the brightest formation on the moon