synaesthesia
Pronunciation:
/ˌsɪn.ɪsˈθiː.zɪ.ə//ˌsɪn.əsˈθi.ʒə/noun
Definitions
A neurological or psychological phenomenon whereby a particular sensory stimulus triggers a second kind of sensation.
(by extension) 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.
A literary or artistic device whereby one kind of sensation is described in the terms of another.