Mare-acidalium
[mahr-ey as-i-dal-ee-uh m, mair-ee] /ˈmɑr eɪ ˌæs ɪˈdæl i əm, ˈmɛər i/
noun
1.
(Sea of Venus) an area in the northern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
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- Mare-australe
[aw-stral-ee, -strey-lee] /ɔˈstræl i, -ˈstreɪ li/ noun 1. (Southern Sea) an area near the south pole of Mars, appearing as a dark region when viewed telescopically from the earth.
- Mare-boreum
[bawr-ee-uh m, bohr-] /ˈbɔr i əm, ˈboʊr-/ noun 1. (Northern Sea) an area near the north pole of Mars, appearing as a dark region when viewed telescopically from the earth.
- Mare-chronium
[kroh-nee-uh m] /ˈkroʊ ni əm/ noun 1. an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
- Mare-cimmerium
[si-meer-ee-uh m] /sɪˈmɪər i əm/ noun 1. (Cimmerian Sea) an area in the southern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
- Mare-crisium
[mahr-ey kree-see-uh m, mair-ee] /ˈmɑr eɪ ˈkri si əm, ˈmɛər i/ noun 1. (Sea of Crises) a dark plain in the first quadrant of the face of the moon: about 66,000 sq. mi. (170,000 sq. km).