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3 definitions found
 for Indigo copper
From The Collaborative International Dictionary of English v.0.48 :

  Indigo \In"di*go\, a.
     Having the color of, pertaining to, or derived from, indigo.
     [1913 Webster]
  
     Indigo berry (Bot.), the fruit of the West Indian shrub
        Randia aculeata, used as a blue dye.
  
     Indigo bird (Zool.), a small North American finch
        ({Cyanospiza cyanea). The male is indigo blue in color.
        Called also indigo bunting.
  
     Indigo blue.
     (a) The essential coloring material of commercial indigo,
         from which it is obtained as a dark blue earthy powder,
         with a reddish luster, C16H10N2O2, which may be
         crystallized by sublimation. Indigo blue is also made
         from artificial amido cinnamic acid, and from artificial
         isatine; and these methods are of great commercial
         importance. Called also indigotin.
     (b) A dark, dull blue color like the indigo of commerce.
  
     Indigo brown (Chem.), a brown resinous substance found in
        crude indigo.
  
     Indigo copper (Min.), covellite.
  
     Indigo green, a green obtained from indigo.
  
     Indigo plant (Bot.), a leguminous plant of several species
        (genus Indigofera), from which indigo is prepared. The
        different varieties are natives of Asia, Africa, and
        America. Several species are cultivated, of which the most
        important are the Indigofera tinctoria, or common
        indigo plant, the Indigofera Anil, a larger species,
        and the Indigofera disperma.
  
     Indigo purple, a purple obtained from indigo.
  
     Indigo red, a dyestuff, isomeric with indigo blue, obtained
        from crude indigo as a dark brown amorphous powder.
  
     Indigo snake (Zool.), the gopher snake.
  
     Indigo white, a white crystalline powder obtained by
        reduction from indigo blue, and by oxidation easily
        changed back to it; -- called also indigogen.
  
     Indigo yellow, a substance obtained from indigo.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Copper \Cop"per\, n. [OE. coper (cf. D. koper, Sw. koppar, Dan.
     kobber, G. kupfer), LL. cuper, fr. L. cuprum for earlier
     Cyprium, Cyprium aes, i.e., Cyprian brass, fr. Gr. ? of
     Cyprus (Gr. ?), anciently renowned for its copper mines. Cf.
     Cypreous.]
     1. A common metal of a reddish color, both ductile and
        malleable, and very tenacious. It is one of the best
        conductors of heat and electricity. Symbol Cu. Atomic
        weight 63.3. It is one of the most useful metals in
        itself, and also in its alloys, brass and bronze.
        [1913 Webster]
  
     Note: Copper is the only metal which occurs native abundantly
           in large masses; it is found also in various ores, of
           which the most important are chalcopyrite, chalcocite,
           cuprite, and malachite. Copper mixed with tin forms
           bell metal; with a smaller proportion, bronze; and with
           zinc, it forms brass, pinchbeck, and other alloys.
           [1913 Webster]
  
     2. A coin made of copper; a penny, cent, or other minor coin
        of copper. [Colloq.]
        [1913 Webster]
  
              My friends filled my pockets with coppers.
                                                    --Franklin.
        [1913 Webster]
  
     3. A vessel, especially a large boiler, made of copper.
        [1913 Webster]
  
     4. pl. Specifically (Naut.), the boilers in the galley for
        cooking; as, a ship's coppers.
        [1913 Webster]
  
     Note: Copper is often used adjectively, commonly in the sense
           of made or consisting of copper, or resembling copper;
           as, a copper boiler, tube, etc.
           [1913 Webster]
  
                 All in a hot and copper sky.       --Coleridge.
           [1913 Webster]
  
     Note: It is sometimes written in combination; as,
           copperplate, coppersmith, copper-colored.
           [1913 Webster]
  
     Copper finch. (Zool.) See Chaffinch.
  
     Copper glance, or Vitreous copper. (Min.) See
        Chalcocite.
  
     Indigo copper. (Min.) See Covelline.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Covelline \Co*vel"line\ (k?-v?l"l?n), Covellite \Co*vel"lite\
     (-l?t), n. [After Covelli, the discoverer.] (Min.)
     A native sulphide of copper, occuring in masses of a dark
     blue color; -- hence called indigo copper.
     [1913 Webster]

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