indigo
(noun) a blue-violet color
indigo, indigo plant, Indigofera tinctoria
(noun) deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye
anil, indigo, indigotin
(noun) a blue dye obtained from plants or made synthetically
Source: WordNet® 3.1
indigoes
plural of indigo
Source: Wiktionary
In"di*go, n.; pl. Indigoes. Etym: [F. indigo, Sp. indigo, indico, L. indicum indigo, fr. Indicus Indian. See Indian.]
1. A kind of deep blue, one of the seven prismatic colors.
2. (Chem.)
Definition: A blue dyestuff obtained from several plants belonging to very different genera and orders; as, the woad, Isatis tinctoria, Indigofera tinctoria, I. Anil, Nereum tinctorium, etc. 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.
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. 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.
In"di*go, a.
Definition: 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 (Zoöl.), 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 (Zoöl.), 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.
Source: Webster’s Unabridged Dictionary 1913 Edition
22 December 2024
(noun) (plural) spectacles that are darkened or polarized to protect the eyes from the glare of the sun; “he was wearing a pair of mirrored shades”
The first coffee-house in Mecca dates back to the 1510s. The beverage was in Turkey by the 1530s. It appeared in Europe circa 1515-1519 and was introduced to England by 1650. By 1675 the country had more than 3,000 coffee houses, and coffee had replaced beer as a breakfast drink.