What does "hallucinogen" mean?

Any substance tending to induce hallucination.

What is a synonym for "hallucinogen"?

Common synonyms include: psychedelic drug, acid, antidepressant, ataractic, belladonna, bhang.

Pronounced //həˈluː.sɪ.nə.d͡ʒɛn//.

/həˈluː.sɪ.nə.d͡ʒɛn/ noun

noun ·Uncommon ·College level

Noun

1
Any substance tending to induce hallucination.
2
a psychoactive drug that induces hallucinations or altered sensory experiences wordnet

"Being a psychoactive agent, a hallucinogen can cause you to dissociate."

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