syn·es·the·sia also syn·aes·the·sia (sÄ­n'Ä­s-thÄ“'zhÉ™)  n.

1. 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.
2. A sensation felt in one part of the body as a result of stimulus applied to another, as in referred pain.
3. The description of one kind of sense impression by using words that normally describe another.

syn.aes.the.tic : Adj.    1.    synaesthetic - relating to or experiencing synesthesia; involving more than one sense; "synesthetic response to music"; "synesthetic metaphor"synesthetic