[sin-uh s-thee-zhuh, -zhee-uh, -zee-uh]
  1. a sensation produced in one modality when a stimulus is applied to another modality, as when the hearing of a certain sound induces the visualization of a certain color.

Origin of synesthesia

From New Latin, dating back to 1890–95; see origin at syn-, esthesia
Related formssyn·es·thete [sin-uh s-theet] /ˈsɪn əsˌθit/, nounsyn·es·thet·ic [sin-uh s-thet-ik] /ˌsɪn əsˈθɛt ɪk/, adjectivenon·syn·es·thet·ic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for synesthetic


  1. the usual US spelling of synaesthesia
Derived Formssynesthetic (ˌsɪniːsˈθɛtɪk), adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

synesthetic in Medicine


  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 that is applied to another, as in referred pain.
Related formssyn′es•thetic (-thĕtĭk) adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.