[foh-tiz-uh m]
noun Psychology.
  1. a form of synesthesia in which a visual sensation, as of color or form, is produced by the sense of touch, hearing, etc.

Origin of photism

1890–95; < Greek phōtismós illumination, equivalent to phōt(ízein) to give light + -ismos -ism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

photism in Medicine


  1. The production of a sensation of light or color by a stimulus to another sense organ, such as that of hearing or touch.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.