411 REFERENCE · Wiktionary
French purple
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Noun
- s
A dyestuff obtained from certain lichen known as orchella weed s, used for colouring woollen and silken fabrics, without the aid of mordants.
See also
orcein (archil, orchil, lacmus)
archil lichen (Roccella tinctoria species)
orcinol
References
en Dyes