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Mare Vaporum

[ vey-pawr-uhm, -pohr- ]
/ veɪˈpɔr əm, -ˈpoʊr- /
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noun
(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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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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