Century Dictionary and Cyclopedia
- n. A crystallizable substance (C20H22O8) found in the bark, root, and leaves of the aspen, Populus Tremula, along with salicin. It forms delicate white needles, which have a sweet taste like that of licorice.
- n. organic chemistry A glycoside, related to salicin, found in the bark of certain species of the poplar (Populus).
GNU Webster's 1913
- n. (Chem.) A glycoside, related to salicin, found in the bark of certain species of the poplar (Populus), and extracted as a sweet white crystalline substance.
- Latin populus poplar + -in: compare French populine. (Wiktionary)
“Aspen contains salicin and populin, which have properties similar to aspirin in reducing fever, pain and inflammation.”
“In the willow and poplar,  a crystalline, bitter substance, salicin or populin, is found.”
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