thebaine

noun Chemistry.

1. a white, crystalline, slightly water-soluble, poisonous alkaloid, C19H21NO3, present in opium in small quantities, but having a strychninelike rather than a narcotic effect.

noun

1. a poisonous white crystalline alkaloid, found in opium but without opioid actions. Formula: C 19 H 21 NO 3Also called: paramorphine

n.

1. A poisonous crystalline alkaloid obtained from opium.paramorphine