Mare Tranquillitatis
[ mahr-ey trang-kwil-i-tah-tis ]
nounAstronomy.
Also called Sea of Tran·quil·i·ty . a dark plain in the first quadrant of the face of the moon: about 110,000 square miles (285,000 square kilometers).
Words Nearby Mare Tranquillitatis
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
Browse