opiate

n. any of a variety of natural and semisynthetic compounds derived from opium. They include the alkaloids morphine and codeine and their derivatives (e.g., heroin [diacetylmorphine]). Opiates, together with synthetic compounds having the pharmacological properties of opiates, are known as opioids.

Browse dictionary by letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Psychology term of the day

December 18th 2024

forward conditioning

in classical conditioning, the pairing of two stimuli such that the conditioned stimulus is presented before the unconditioned stimulus. Also called forward pairing. Compare backward conditioning.