| 释义 |
indigo blue
indigo blue n, adj (indigo-blue when prenominal) (Colours) the full name for indigo1, indigo3in′digo blue′
n. 1. indigo (def. 4). 2. Also called indigo, indigotin. a dark blue, water-insoluble, crystalline powder, C16H10N2O2, the coloring principle of the dye indigo. [1705–15] in′di•go-blue′, adj. Translationsindigo blue
indigo blue[′in·də·gō ′blü] (organic chemistry) C16H10O2N2 A component of the dye indigo, crystallizing as dark-blue rhomboids that break down at 30°C, that are soluble in hot aniline and hot chloroform, and that are also made synthetically; used as a reagent and a dye. Also known as indigo. MedicalSeeindigo |