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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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.