archil

/ˈɑːrkɪl/
noun
  1. A purple or violet dye obtained from certain lichens, used historically for coloring fabrics and in art.
    • In medieval times, archil was a valuable trade item for dyeing wool.
    • The old manuscript showed traces of archil in its illuminated letters.
    • The artist used archil to create a deep purple hue in the painting.
Synonyms
What does "archil" mean? | whatsthatwordmean | whatsthatwordmean