Hallucinogen definitions

hə-lo͝o'sə-nə-jən
A substance that induces hallucination.
noun
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A drug or other substance that produces hallucinations.
noun
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A substance that induces hallucination.
noun
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A drug or chemical that causes a person to have hallucinations. Mescaline, LSD, and psilocybin are hallucinogens.
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Any substance tending to induce hallucination.
noun
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Origin of hallucinogen

hallucination + -o- (“(interconsonantal)”) + -gen (“producer”).