anti - asom
- anti-hallucinatory system
- antibiotics and hallucinations
- anticholinergic hallucinogen
- antidepressants and hallucinations
- antipsychotics and hallucinations
- Anton's blindness
- Anton's symptom
- Anton's syndrome
- Anton-Babinski syndrome
- Anwesenheit
- apophany
- apophenia
- apparition
- apparitional experience
- apperceptive hallucination
- apperceptive mindblindness
- Archimedes' spiral
- Aretaeus of Cappadocia
- Arieti's definition of hallucinations
- Aristotle's illusion
- arrowhead illusion
- artificial somnambulism
- artificial spectrum top
- Asaad's definition of hallucinations
- Asaad's definition of illusions
- aschematia
