the branch of chemistry that deals with the chemical action of light.

Nearby words

  1. photocatalyst,
  2. photocathode,
  3. photocell,
  4. photochemical,
  5. photochemical smog,
  6. photochemotherapy,
  7. photochromic,
  8. photochromic lens,
  9. photochromy,
  10. photochronograph

Origin of photochemistry

First recorded in 1865–70; photo- + chemistry

Related formspho·to·chem·i·cal [foh-toh-kem-i-kuh l] /ˌfoʊ toʊˈkɛm ɪ kəl/, pho·to·chem·ic, adjectivepho·to·chem·i·cal·ly, adverbpho·to·chem·ist, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for photochemistry

  • It is agreed by scientists that photochemistry has a promising future.

    Artificial Light|M. Luckiesh

British Dictionary definitions for photochemistry



the branch of chemistry concerned with the chemical effects of light and other electromagnetic radiationsAlso called: actinochemistry
Derived Formsphotochemist, noun

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

Medicine definitions for photochemistry




The branch of chemistry that deals with the effects of light on chemical systems.
Related formspho′to•chemi•cal (-ĭ-kəl) adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for photochemistry



The scientific study of the effects of light and ultraviolet radiation on chemical reactions.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.