Pronunciation: (hu-vā'lē-us; Ger. hā-vā'lē-oos"), [key]
1. Johannes (Johann Hewel or Hewelke), 1611–87, Polish astronomer: charted the moon's surface and discovered four comets.
2. a walled plain in the second quadrant of the face of the moon: about 100 mi. (160 km) in diameter.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.