Mare Vaporum

US:USA pronunciation: respellingUSA pronunciation: respelling(vā pôrəm, -pōr-)


WordReference Random House Unabridged Dictionary of American English © 2025
Mare Va•porum  (vā pôrəm, -pōr-),USA pronunciation 
  1. Astronomy(Sea of Vapors) a dark plain in the first quadrant and near the center of the face of the moon: about 39,000 sq. mi. (101,000 sq. km).


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