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photoactivation

[ foh-toh-ak-tuh-vey-shuhn ]
/ ˌfoʊ toʊˌæk təˈveɪ ʃən /
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noun Chemistry.

the activation or control of a chemical, chemical reaction, or organism by light, as the activation of chlorophyll by sunlight during photosynthesis.

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QUIZ YOURSELF ON AFFECT VS. EFFECT!

In effect, this quiz will prove whether or not you have the skills to know the difference between “affect” and “effect.”
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The rainy weather could not ________ my elated spirits on my graduation day.

Origin of photoactivation

1920–25; photo- + activation
pho·to·ac·tive, adjectivepho·to·ac·tiv·i·ty, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
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