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halls of ivy
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hallucinogen

hal·lu·cin·o·gen [ hə lss'nəjən ] (plural hal·lu·cin·o·gens)


noun 
Definition:
 
chemical inducing hallucinations: a substance, especially a drug such as LSD, that causes hallucinations


hal·lu·cin·o·gen·ic [ hə lss'nə jénnik ] adjective
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