photoactivation

[ foh-toh-ak-tuh-vey-shuh n ]

/ ˌfoʊ toʊˌæk təˈveɪ ʃən /

noun Chemistry.

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

QUIZZES

"EVERYDAY" VS. "EVERY DAY" QUIZ: IS IT ONE WORD OR TWO?

An everyday activity is one you do every day. (Thanks, English.) Practice using "everyday," one word, and "every day," two words, in this fun quiz with … everyday example sentences!

Question 1 of 16

“Everyday" is an adjective that describes things that happen habitually or items that are normal items or events.

True

False

TAKE THE QUIZ TO FIND OUT

Origin of photoactivation

1920–25; photo- + activation

OTHER WORDS FROM photoactivation

pho·to·ac·tive, adjectivepho·to·ac·tiv·i·ty, noun

Words nearby photoactivation

photo-mount, photo-offset, photo-patch test, photo-secession, photoactinic, photoactivation, photoactive, photoaging, photoallergic, photoanalyst, photoautotroph