photochemistry
noun
pho·to·chem·is·try
ˌfō-tō-ˈke-mə-strē 
1
: a branch of chemistry that deals with the effect of radiant energy in producing chemical changes
2
a
: photochemical properties
the photochemistry of gases
b
: photochemical processes
photochemistry of vision
Examples of photochemistry in a Sentence
Recent Examples on the Web
Astronomers believe this breakdown leads to complex photochemistry in Titan’s atmosphere, where the products react with each other and with nitrogen.
—
The Physics Arxiv Blog, Discover Magazine, 15 Jan. 2024
The planet is so hot, the processes that normally lead to the creation of sulfur dioxide shouldn’t be happening—which means that less common reactions, like photochemistry, are likely responsible.
—Dan Falk, Smithsonian Magazine, 5 July 2023
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
The Physics Arxiv Blog, Discover Magazine, 15 Jan. 2024
The planet is so hot, the processes that normally lead to the creation of sulfur dioxide shouldn’t be happening—which means that less common reactions, like photochemistry, are likely responsible.
—Dan Falk, Smithsonian Magazine, 5 July 2023
Cite this Entry
“Photochemistry.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photochemistry. Accessed 7 May. 2025.
Copy CitationMedical Definition
photochemistry
noun
pho·to·chem·is·try
-ˈkem-ə-strē
plural photochemistries
1
: a branch of chemistry that deals with the effect of radiant energy in producing chemical changes
2
a
: photochemical properties
the photochemistry of gases
b
: photochemical processes
the photochemistry of vision
Love words? Need even more definitions?
Merriam-Webster unabridged
Share