The Collaborative International Dictionary
Helicin
Helicin \Hel"i*cin\, n. (Chem.) A glucoside obtained as a white crystalline substance by partial oxidation of salicin, from a willow ( Salix Helix of Linn[ae]us.)
Wiktionary
helicin
n. (context organic compound English) A glucoside obtained by partial oxidation of salicin from a willow, (taxlink Salix helix species noshow=1), probably (taxlink Salix purpurea species noshow=1).