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)