• Webster's Revised Unabridged Dictionary
    • n Jalapin (Chem) A glucoside found in the stems of the jalap plant and scammony. It is a strong purgative.
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Century Dictionary and Cyclopedia
    • n jalapin A glucoside resin which is one of the purgative principles of jalap and of various plants of the convolvulaceous order. See jalap.
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Chambers's Twentieth Century Dictionary
    • n Jalapin a glucoside resin, one of the purgative principles of jalap
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In literature:

The active principle in aloes is aloin; of jalap, jalapin; of white hellebore, veratria; and of colchicum, colchicin.
"Aids to Forensic Medicine and Toxicology" by W. G. Aitchison Robertson
Castor oil, senna, jalap, jalapine, and scammony are simple aperients.
"The Mother's Manual of Children's Diseases" by Charles West, M.D.
It is insoluble in ether, and is more active than jalapin.
"Encyclopaedia Britannica, 11th Edition, Volume 15, Slice 2" by Various