parillin

from The Century Dictionary.

• noun A crystalline glucoside, C₄₀H₇₀O₁₈, found in sarsaparilla root, of which it is the active principle. It melts, with decomposition, at 210° C., and yields sugar and parigenin when hydrolyzed with dilute acids. It slows the action of the heart. Also called parillic or parillinic acid, saliseparin, salseparisin.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A glucoside resembling saponin, found in the root of sarsaparilla, smilax, etc., and extracted as a bitter white crystalline substance; -- called also smilacin, sarsaparilla saponin, and sarsaparillin.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun sarsaparillin