Maritime European Communications Satellite
[er-i-three-uh m] /ˌɛr ɪˈθri əm/ noun 1. (Red Sea) an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
[fey-koo n-di-tah-tis, fee-] /feɪˌkʊn dɪˈtɑ tɪs, fi-/ noun 1. (Sea of Fertility) a dark plain in the fourth quadrant and extending into the first quadrant of the face of the moon: about 160,000 sq. mi. (415,000 sq. km).
[fri-gawr-is, -gohr-] /frɪˈgɔr ɪs, -ˈgoʊr-/ 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 (1200 km) long: about 67,000 sq. mi. (174,000 sq. km).
[hyoo-mer-uh m, hyoo-mawr-, -mohr-] /ˈhyu mər əm, hyuˈmɔr-, -ˈmoʊr-/ noun 1. (Sea of Moisture) a dark plain in the third quadrant of the face of the moon: about 45,000 sq. mi. (117,000 sq. km).