Meaning of Mare Acidalium

Ma•re Ac•i•dal•i•um

Pronunciation: (mär'ā as"i-dal'ē-um, mâr'ē), [key]
  1. (Sea of Venus) an area in the northern hemisphere of Mars, appearing as a dark region when viewed telescopically from the earth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.