Definition of hallucinogen noun from the Oxford Advanced American Dictionary

 

hallucinogen

 noun
noun
NAmE//hæˈlusənədʒən//
 
 
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a drug, such as LSD, that affects people's minds and makes them see and hear things that are not really there
hallucinogenic
 
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NAmE//həˌlusənəˈdʒɛnɪk//
 
adjective hallucinogenic drugs/effects
See the Oxford Advanced Learner's Dictionary entry: hallucinogen