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Mare Frigoris

[ fri-gawr-is, -gohr- ]

noun

  1. ( Sea of Cold ) a dark plain in the northern hemisphere, in the first and second quadrants of the face of the moon: about 55 miles (90 km) wide at its narrowest width and 750 miles (1,200 km) long: about 67,000 sq. mi. (174,000 sq. km).

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inveterate

[in-vet-er-it ]

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