generally any ore of copper; spec. black oxide of copper, melaconite, n.
| 单词 | θ6727 |
| 释义 | the world > the earth > minerals > types of mineral > oxides and hydroxides > [noun] > general formula AO > black oxide of copper (6) copper ore1713 generally any ore of copper; spec. black oxide of copper, melaconite, n. melaconise1839 = melaconite, n. melaconite1850 An earthy impure black oxide of copper; a form of tenorite containing hydrated copper silicate and carbonate. tenorite1865 Black oxide of copper, found in thin iron-black scales on lava at Vesuvius: see quot. Chile copper1888 (see quot. 1888). paramelaconite1892 an oxide of copper, Cu4O3, containing both mono- and divalent copper, forming black prismatic crystals and belonging to the tetragonal crystal system. |
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