photochemistry

[ foh-toh-kem-uh-stree ]
/ ˌfoʊ toʊˈkɛm ə stri /

noun

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

Origin of photochemistry

First recorded in 1865–70; photo- + chemistry

Related forms

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

Examples from the Web for photochemical

  • Scheele's work aroused much interest in photochemical effects and many investigations followed.

    Artificial Light|M. Luckiesh
  • The foregoing are only a few of the multitude of photochemical reactions and other effects of radiant energy.

    Artificial Light|M. Luckiesh
  • The product of photochemical decomposition no longer forms azo-colours with amines or phenols.

    Coal|Raphael Meldola
  • We must therefore conclude that the heliotropic curvature of the polyps is determined by a photochemical action of the light.

British Dictionary definitions for photochemical (1 of 2)

photochemical

/ (ˌfəʊtəʊˈkɛmɪkəl) /

adjective

of or relating to photochemistry; involving the chemical effects of light

Derived Forms

photochemically, adverb

British Dictionary definitions for photochemical (2 of 2)

photochemistry

/ (ˌfəʊtəʊˈkɛmɪstrɪ) /

noun

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

Derived Forms

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

Medicine definitions for photochemical

photochemistry

[ fō′tō-kĕmĭ-strē ]

n.

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

Related forms

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.

Science definitions for photochemical

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.