Polygonum tinctorium
Indigo In"di*go, 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]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • Polygonum tinctorum — Redshank Scientific classification Kingdom: Plantae (unranked): Angiosperms (unranked): Eudicots …   Wikipedia

  • Polygonum — Knotgrass redirects here. For the moth, see Acronicta rumicis. Polygonum Polygonum coccineum Scientific classification Kingdom …   Wikipedia

  • Polygonum — Vogelknöteriche Echter Vogelknöterich (Polygonum aviculare) Systematik Klasse …   Deutsch Wikipedia

  • Polygōnum — (P. L., Knöterig), Pflanzengattung aus der Familie der Polygoneae verae, 8. Kl. 3. Ordn. L.; einfache Blüthenhülle vier bis fünfspaltig od. theilig, oberwärts gefärbt; Staubgefäße zweireihig, in der äußeren fünf, in der inneren drei; letztere… …   Pierer's Universal-Lexikon

  • Polygŏnŭm — L. (Knöterich), Gattung der Polygonazeen, ein oder mehrjährige Kräuter oder Halbsträucher, bald sehr dünnzweigig, niedrig, niedergestreckt, auch schachtelhalmartig, bald hoch, dick, fleischig, auch schlingend, mit häufig stark knotig gegliedertem …   Meyers Großes Konversations-Lexikon

  • Polygonum — Polygŏnum L., Knöterich, Pflanzengattg. der Polygonazeen, überall verbreitet, meist mit lockern Blütenähren; P. hydropiper L. (scharfer Knöterich, Wasserpfeffer), von brennend beißendem Geschmack. Die Blätter von P. bistorta L. (Wiesenknöterich,… …   Kleines Konversations-Lexikon

  • Nereum tinctorium — Indigo In di*go, 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… …   The Collaborative International Dictionary of English

  • Персикария — ? Персикария Горец земноводный …   Википедия

  • Persicaria — Taxobox name = Persicaria image width = 240px image caption = Flowering spike of Persicaria maculata regnum = Plantae divisio = Magnoliophyta classis = Magnoliopsida ordo = Caryophyllales familia = Polygonaceae genus = Persicaria genus authority …   Wikipedia

  • Duravia — Vogelknöteriche Echter Vogelknöterich (Polygonum aviculare) Systematik Klasse …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”