A neurological condition where stimulation of one sense automatically and involuntarily triggers experiences in another sense, such as seeing colors when hearing sounds.
From Greek 'chroma' (color) + 'aisthesis' (sensation), a form of synesthesia specifically involving color perception triggered by non-visual stimuli.
Synesthetes with chromesthesia report that the letter 'A' is always red and 'B' is always blue, or that the note C-sharp is always violet—their brains are literally wired to cross-activate sensory regions, something brain imaging has confirmed is anatomically real.
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