n :  a poisonous alkaloid C₁₇H₂₁NO₄ found in the roots of various plants (as jimsonweed) of the family Solanaceae and used chiefly in the form of its crystalline hydrobromide as a sedative in connection with morphine or other analgesics in surgery and obstetrics, in the prevention of motion sickness, and as the truth serum in lie detector tests - called also hyoscine  .
 
   
 
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