pho·​to·​bi·​ol·​o·​gy ˌfō-tō-(ˌ)bī-ˈä-lə-jē How to pronounce photobiology (audio)
: a branch of biology that deals with the effects on living organisms of radiant energy (such as light)
photobiological adjective
or less commonly photobiologic
photobiologist noun

Examples of photobiology in a Sentence

Recent Examples on the Web Antony Young, emeritus professor of experimental photobiology at King's College London, warns that most of the damage caused by ultraviolet radiation is not visible to the naked eye. Nina Avramova, CNN, 28 June 2019

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'photobiology.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History


International Scientific Vocabulary

First Known Use

1923, in the meaning defined above

Time Traveler
The first known use of photobiology was in 1923

Dictionary Entries Near photobiology

Cite this Entry

“Photobiology.” Dictionary, Merriam-Webster, Accessed 12 Apr. 2024.

Medical Definition


pho·​to·​bi·​ol·​o·​gy ˌfōt-ō-(ˌ)bī-ˈäl-ə-jē How to pronounce photobiology (audio)
plural photobiologies
: a branch of biology that deals with the effects of radiant energy (as light) on living things
photobiological adjective
also photobiologic
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!