noun. 1. a false interpretation or hallucination of light. 2. a type of synesthesia wherein light or color sensations take place in reaction to arousal of other senses.

PHOTISM: "The photism you saw was not actually present on the screen."
Cite this page: N., Pam M.S., "PHOTISM," in, April 7, 2013, (accessed September 24, 2021).