/ Dictionary / Index L Langrenus: Meaning and Definition of Find definitions for: Lan•gre•nus Pronunciation: (lan-grē'nus), [key] — n. a walled plain in the fourth quadrant of the face of the moon: about 85 miles (135 km) in diameter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. langrage Langreo Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language