[ foh-toh-kem-uh-stree ]

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

Origin of photochemistry

First recorded in1865–70; photo- + chemistry

Other words from photochemistry

  • pho·to·chem·i·cal [foh-toh-kem-i-kuhl], /ˌfoʊ toʊˈkɛm ɪ kəl/, pho·to·chem·ic, adjective
  • pho·to·chem·i·cal·ly, adverb
  • pho·to·chem·ist, noun

Words Nearby photochemistry Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use photochemistry in a sentence

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

    Artificial Light | M. Luckiesh

British Dictionary definitions for photochemistry


/ (ˌfəʊtəʊˈkɛmɪstrɪ) /

  1. the branch of chemistry concerned with the chemical effects of light and other electromagnetic radiations: Also called: actinochemistry

Derived forms of photochemistry

  • photochemist, 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

Scientific definitions for photochemistry


[ fō′tō-kĕmĭ-strē ]

  1. 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.