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a walled plain in the fourth quadrant of the face of the moon: about 85 miles (135 km) in diameter.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for langrenus
The inhabitants of
, though rational, do not belong to the highest orders of intelligent Lunarians.
Myths and Marvels of Astronomy
Richard A. Proctor
was the first to do serious work on selenography, and named the lunar features after eminent men.
History of Astronomy