[1] : The Collaborative International Dictionary of English v.0.48

indigo \in"digo\, 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
see also:
indigo berry randia aculeata indigo bird cyanospiza cyanea indigo bunting indigo blue 
c16h10n2o2 indigotin indigo brown indigo copper indigo green 
indigo plant indigofera indigofera tinctoria common indigo plant indigofera anil 
indigofera disperma indigo purple indigo red indigo snake indigo white 
indigogen indigo yellow 

[2] : The Collaborative International Dictionary of English v.0.48

indigo \in"digo\, n.; pl. indigoes. f. indigo, sp. indigo,
   indico, l. indicum indigo, fr. indicus indian. see indian.
   1913 webster
   1. a kind of deep blue, one of the seven prismatic colors.
      1913 webster

   2. chem. a blue dyestuff obtained from several plants
      belonging to very different genera and orders, such as,
      the woad, isatis tinctoria family cruciferae,
      indigofera suffroticosa, indigofera tinctoria family
      leguminosae, indigofera anil, nereum tinctorium,
      polygonum tinctorium ait. family polygonaceae, etc.;
      called also natural indigo. it is a dark blue earthy
      substance, tasteless and odorless, with a copper-violet
      luster when rubbed. indigo does not exist in the plants as
      such, but is obtained by decomposition of the glycoside
      indican.
      1913 webster

   note: commercial indigo contains the essential coloring
         principle indigo blue or indigotine, with several other
         dyes; as, indigo red, indigo brown, etc., and various
         impurities. indigo is insoluble in ordinary reagents,
         with the exception of strong sulphuric acid.
         1913 webster

   chinese indigo bot., isatis indigotica, a kind of woad.
      

   wild indigo bot., the american herb baptisia tinctoria
      which yields a poor quality of indigo, as do several other
      species of the same genus.
      1913 webster
see also:
indigoes indian isatis tinctoria cruciferae indigofera suffroticosa indigofera tinctoria 
leguminosae indigofera anil nereum tinctorium polygonum tinctorium polygonaceae 
natural indigo indican chinese indigo isatis indigotica wild indigo 
baptisia tinctoria 

[3] : WordNet (r) 2.0

indigo
     n 1: a blue dye obtained from plants or made synthetically syn:
          anil, indigotin
     2: deciduous subshrub of southeastern asia having pinnate
        leaves and clusters of red or purple flowers; a source of
        indigo dye syn: indigo plant, indigofera tinctoria
     3: a blue-violet color
     also: indigoes pl
see also:
anil indigotin indigo plant indigofera tinctoria indigoes 

Indigo >> I Words
Indigo, definition of term: Indigo
indigo_pag1.html

Indigo Plant >> I Words
Indigo Plant, definition of term: Indigo Plant
indigo+plant_pag1.html

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