Populin
Pronunciation : Pop"u*lin
Part of Speech : n.
Etymology : [L. populus poplar: cf. F. populine.] (Chem.)
Definition : Defn: A glycoside, related to salicin, found in the bark of certain species of the poplar (Populus), and extracted as a sweet white crystalline substance.
Source : Webster's Unabridged Dictionary, 1913