light reaction

noun

: the phase of photosynthesis that requires the presence of light and that involves photophosphorylation

Example Sentences

Recent Examples on the Web Visitors have the chance to kayak, and are also encouraged to swim and splash around in the water in order to trigger the light reactions. Sunset, 22 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'light reaction.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

1925, in the meaning defined above

Time Traveler
The first known use of light reaction was in 1925

Dictionary Entries Near light reaction

Cite this Entry

“Light reaction.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20reaction. Accessed 28 Jan. 2023.

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