stupefacient


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stu·pe·fa·cient

 (sto͞o′pə-fā′shənt, styo͞o′-)
adj.
Inducing stupor; stupefying or narcotic.
n.
A drug, such as a narcotic, that induces stupor.

[Latin stupefaciēns, stupefacient-, present participle of stupefacere, to stupefy; see stupefy.]

stupefacient

(ˌstjuːpɪˈfeɪʃɪənt)
n
(Pharmacology) a drug that causes stupor
adj
(Pharmacology) of, relating to, or designating this type of drug
[C17: from Latin stupefacere to make senseless, from stupēre to be stunned + facere to make]