hallucinogen

/həˈluːsɪnədʒən/
noun
  1. A substance that causes hallucinations, altering a person's perception of reality.
    • Some mushrooms contain a natural hallucinogen used in traditional ceremonies.
    • LSD is a powerful hallucinogen that can cause vivid visual and auditory distortions.
    • The doctor warned that the medication could act as a mild hallucinogen in high doses.
Synonyms
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