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synesthesia

noun

  1. perceptual phenomenon in which stimulation of one sensory or cognitive pathway leads to involuntary experiences in a second sensory or cognitive pathway
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Wiktionary

noun

Etymology: Etymology tree Proto-Indo-European *sem-der.? Proto-Hellenic *ksún Ancient Greek σύν (sún) Ancient Greek σῠν- (sŭn-)der. English syn- English -esthesia English synesthesia From syn- + -esthesia.

  1. Alternative spelling of synaesthesia.

    “[…] R. H. Gault's case of synesthesia in a deaf and blind girl, who could distinguish colors by the sense of smell, […]”

    “Because of this, SSDs are one of the first technologies to meaningfully demonstrate just what synesthesia – or at least one kind of it – might feel like to those who have never had it.”