REFLEX POLYSYNAESTHETIC HALLUCINOSIS
A term coined in or shortly before 2005 by the British psychiatrists Anna Goel and Francis James Eva to denote a " synaesthetic hallucination elicited by a single sensory stimulus and manifesting itself in more than one sensory modality.
References
Goel, A., Eva, F.J. (2005). Reflex polysynaesthetic hallucinosis in a man with schizophrenia.Progression in Neurology and Psychiatry, 9, 36-40.