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The Collaborative International Dictionary
Mars brown

Mars \Mars\ (m[aum]rz), prop. n. [L. Mars, gen. Martis, archaic Mavors, gen. Mavortis.]

  1. (Rom. Myth.) The god of war and husbandry.

  2. (Astron.) One of the planets of the solar system, the fourth in order from the sun, or the next beyond the earth, having a diameter of about 4,200 miles, a period of 687 days, and a mean distance of 141,000,000 miles. It is conspicuous for the redness of its light.

  3. (Alchemy) The metallic element iron, the symbol of which
    --Chaucer.

    Mars brown, a bright, somewhat yellowish, brown.