[1] : 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 

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

Natural >> N Words
Natural, definition of term: Natural
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Natural Resourc >> N Words
Natural Resourc, definition of term: Natural Resourc
natural+resourc_pag1.html

Natural Religio >> N Words
Natural Religio, definition of term: Natural Religio
natural+religio_pag1.html

Natural Resourc >> N Words
Natural Resourc, definition of term: Natural Resourc
natural+resourc_pag1.html

Natural Science >> N Words
Natural Science, definition of term: Natural Science
natural+science_pag1.html

Natural Theolog >> N Words
Natural Theolog, definition of term: Natural Theolog
natural+theolog_pag1.html

Natural Selecti >> N Words
Natural Selecti, definition of term: Natural Selecti
natural+selecti_pag1.html

Natural Philoso >> N Words
Natural Philoso, definition of term: Natural Philoso
natural+philoso_pag1.html

Natural Logarit >> N Words
Natural Logarit, definition of term: Natural Logarit
natural+logarit_pag1.html

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