Definitions
from The Century Dictionary.
- noun A red coloring matter obtained from
Alkanna (Anchusa) tinctoria.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A resinoid coloring matter obtained from alkanet root.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun organic chemistry A
resinoid colouring matter obtained fromalkanet root .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin anchusa the plant alkanet, from Ancient Greek.
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Examples
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Its colouring matter or _anchusin_ has the character of a resin, and is dark-red, softened by heat, insoluble in water, soluble in alcohol and alkalis, and freely so in ether, fats, and volatile oils, to all of which it imparts a brilliant red hue.
Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field
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To obtain anchusin, all the soluble matters are first abstracted from the bruised root by water: it is then digested in a solution of carbonate of potash, from which it may be readily precipitated by an acid.
Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field
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