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Adjective: stupefacient  ,st(y)oo-pu'fey-shunt
  1. Causing stupefaction; having a numbing or deadening effect
    "The stupefacient drug left the patient in a dazed state"
Noun: stupefacient  ,st(y)oo-pu'fey-shunt
  1. A drug or substance that induces stupor or dulls the senses
    "The ancient Egyptians used various stupefacients in their religious rituals"

Derived forms: stupefacients

Encyclopedia: Stupefacient