[ foh-toh-kem-uh-stree ]
/ ˌfoʊ toʊˈkɛm ə stri /
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the branch of chemistry that deals with the chemical action of light.



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Origin of photochemistry

First recorded in 1865–70; photo- + chemistry

OTHER WORDS FROM photochemistry

pho·to·chem·i·cal [foh-toh-kem-i-kuhl], /ˌfoʊ toʊˈkɛm ɪ kəl/, pho·to·chem·ic, adjectivepho·to·chem·i·cal·ly, adverbpho·to·chem·ist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences 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

/ (ˌfəʊtəʊˈkɛmɪstrɪ) /


the branch of chemistry concerned with the chemical effects of light and other electromagnetic radiationsAlso 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

Medical definitions for photochemistry

[ fō′tō-kĕmĭ-strē ]


The branch of chemistry that deals with the effects of light on chemical systems.

Other words from photochemistry

pho′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.

Scientific definitions for photochemistry

[ fō′tō-kĕmĭ-strē ]

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.
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