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Mare Undarum

[ uhn-dahr-uhm ]
/ ʌnˈdɑr əm /
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noun
(Sea of Waves) a dark plain in the first quadrant of the face of the moon: about 4,800 sq. mi. (12,000 sq. km).
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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