Synaesthesia

Noun

1. A neurological or psychological phenomenon whereby a particular sensory stimulus triggers a second kind of sensation. .mw-parser-output .defdate{font-size:smaller}
2. The association of one sensory perception with, or description of it in terms of, a different perception that is not experienced at the same time.
3. A literary or artistic device whereby one kind of sensation is described in the terms of another.