from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A natural dye and naphthoquinone derivative obtained from the borage plant Alkanna tinctoria, used as a food colouring and in cosmetics.

from The Century Dictionary and Cyclopedia

  • n. A coloring matter, C15H14O4, obtained as a dark reddish-brown powder from Alkanna tinctoria.


Alkanna +‎ -in (Wiktionary)


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