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Mare Vaporum

[vey-pawr-uh m, -pohr-] /veɪˈpɔr əm, -ˈpoʊr-/
noun
1.
(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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Based on the Random House Dictionary, © Random House, Inc. 2015.
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Historical Examples
  • South of the Mare Vaporum are found some of the most notable of those strange lunar features that are called "clefts" or "rills."

    Pleasures of the telescope Garrett Serviss

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