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Webster 1913 Edition

Noun.

(Chem.)

A glucoside found in the stems of the jalap plant and scammony. It is a strong purgative.

jalapin ‎(countable and uncountable, plural jalapins)

The active principle of scammony, the glucoside with chemical formula C₃₄H₁₁₄O₆, a powerful purgative.