from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A potassium salt, C8H6NO4SK, found in sweat and urine and formed by the conversion of tryptophan to indole by intestinal bacteria.
- n. A glucoside, C14H17NO6, occurring in the indigo plant and used as a source for indigo dye.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A glucoside obtained from woad and other plants, the source of natural indigo.
- n. An indigo-forming substance found in urine and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin); an indoxyl sulphate of potash.
from the GNU version of the Collaborative International Dictionary of English
- n. A glucoside (C14H17NO6) obtained from woad (indigo plant, Isatis Tinctoria) and other plants (see indigo), as a yellow or light brown sirup. When purified it is obtained as spear-shaped crystals. It has a nauseous bitter taste. By the action of acids, enzymes, etc., it breaks down into sugar and indigo. It is the source of natural indigo. Chemically it is the 3-glucoside of indole, H-indol-3-yl-β-D-glucopyranoside.
- n. An indigo-forming substance, found in urine, and other animal fluids, and convertible into red and blue indigo (urrhodin and uroglaucin). Chemically, it is indoxyl sulphate of potash, C8H6NSO4K, and is derived from the indol formed in the alimentary canal. Called also uroxanthin.
from The Century Dictionary and Cyclopedia
- n. The natural glucoside (C26H31NO17) by the decomposition of which indigo blue is produced from the various species of indigo-producing plants.
- n. The alkali salt of indoxyl-sulphuric acid, C8H6NSO4H. It occurs in urine. See the following phrase.
Latin indicum, indigo; see indigo + -an2.(American Heritage® Dictionary of the English Language, Fourth Edition)
See indigo. (Wiktionary)