Mare Humorum

[hyoo-mer-uh m, hyoo-mawr-, -mohr-]

noun

(Sea of Moisture) a dark plain in the third quadrant of the face of the moon: about 45,000 sq. mi. (117,000 sq. km).

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019