5-methoxy-dimethyltryptamine en · NOUN Pronunciation (General-American) audio/faɪvmɛθˌɒksidaɪmɛθəlˈtɹɪptəmiːn/ (US) audio Meanings (uncountable) A potent hallucinogenic drug that is a methyl ether of dimethyltryptamine. Synonyms 5-MeO-DMT