The Collaborative International Dictionary
Wiktionary
frangula
n. (context medicine English) The bark of (taxlink Rhamnus frangula genus noshow=1) used as a laxative or cathartic
Wikipedia
Frangula
Frangula is a genus of about 35 accepted species of shrubs or small trees, commonly known as buckthorns in the flowering plant family Rhamnaceae.
Usage examples of "frangula".
Rhamnus Frangula, trimmed one inch in diameter and overheated well in a closed iron retort, ground fine— three measures, packed tightly.