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Mare Cimmerium

[ si-meer-ee-uhm ]
/ sɪˈmɪər i əm /
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noun
(Cimmerian Sea) an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

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