Pronunciation: (kep'lur), [key]
1. Jo•hann Pronunciation: (yō'hän), [key] 1571–1630, German astronomer.
2. a crater in the second quadrant of the face of the moon having an extensive ray system: about 22 miles (35 km) in diameter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.