from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A yellow crystalline dyestuff extracted from a species of buckthorn, Rhamnus frangula.
from the GNU version of the Collaborative International Dictionary of English
- n. A yellow crystalline dyestuff, regarded as a glucoside, extracted from a species (Rhamnus Frangula) of the buckthorn; -- called also rhamnoxanthin.
from The Century Dictionary and Cyclopedia
- n. A yellow crystallizable coloring matter (C20H20O10) contained in the bark of the alder-buckthorn, Rhamnus Frangula, and other species of the same genus.
frangula + -in (Wiktionary)