Source : Webster's Revised Unabridged Dictionary (1913)

Indigo \In"di*go\, a.
   Having the color of, pertaining to, or derived from, indigo.

   {Indigo berry} (Bot.), the fruit of the West Indian shrub
      {Randia aculeata}, used as a blue dye.

   {Indigo bird} (Zo["o]l.), 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 {I. tinctoria}, or common indigo plant,
      the {I. Anil}, a larger species, and the {I. 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} (Zo["o]l.), 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.

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.

   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.

   2. A coin made of copper; a penny, cent, or other minor coin
      of copper. [Colloq.]

            My friends filled my pockets with coppers.
                                                  --Franklin.

   3. A vessel, especially a large boiler, made of copper.

   4. pl. Specifically (Naut.), the boilers in the galley for
      cooking; as, a ship's coppers.

   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.

               All in a hot and copper sky.       --Coleridge.

   Note: It is sometimes written in combination; as,
         copperplate, coppersmith, copper-colored.

   {Copper finch}. (Zo["o]l.) See {Chaffinch}.

   {Copper glance}, or {Vitreous copper}. (Min.) See
      {Chalcocite}.

   {Indigo copper}. (Min.) See {Covelline}.