Emily Dickinson Lexicon

MAL'A-CHITE, n. [Gr. μαλαχη, mallows, L. malva, from μαλακος, soft, so named from its resembling the color of the leaf of mallows.]

An oxyd of copper, combined with carbonic acid, found in solid masses of a beautiful green color. It consists of layers, in the form of nipples or needles converging toward a common center. It takes a good polish, and is often manufactured into toys. Fourcroy. Dict. Nat. Hist.