Synesthesia

syn·es·the·sia syn·aes·the·sia (sĭn’ĭs-thē’zhə)
n.
A condition in which one type of stimulation evokes the sensation of another, as when the hearing of a sound produces the visualization of a color.
A sensation felt in one part of the body as a result of stimulus applied to another, as in referred pain.
The description of one kind of sense impression by using words that normally describe another.