Dictionary
Pla•to
Pronunciation: (plā'tō), [key]—
n.
1. 427–347b.c.,Greek philosopher.
2. a walled plain in the second quadrant of the face of the moon, having a dark floor: about 60 miles (96 km) in diameter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.