/ ˌhæˈluːsɪnədʒən; NAmE / noun
a drug, such as LSD , that affects people's minds and makes them see and hear things that are not really there
► hal·lu·cino·gen·ic / həˌluːsɪnəˈdʒenɪk; NAmE / adjective :
hallucinogenic drugs / effects
HELP NOTE : Some people use
an
instead of
a
before these words, and then usually do not pronounce the 'h'. This now sounds old-fashioned.