orcein en · NOUN
Etymology
From French orcéine, modification of orcinol. See also orchil.
Meanings
- (uncountable, usually) a dye, related to litmus, that is extracted from the lichen Rocella tinctoria; used as a microscopic stain and as a food colouring
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| orceins | Number=Plur | lexicographic |
Deriveds
acetoorcein · leucoorcein · aceto-orcein