Dictionary.com

actinism

[ ak-tuh-niz-uhm ]
/ ˈæk təˌnɪz əm /
Save This Word!

noun

the property of radiation by which chemical effects are produced.

QUIZZES

QUIZ YOURSELF ON “THEIR,” “THERE,” AND “THEY’RE”

Are you aware how often people swap around “their,” “there,” and “they’re”? Prove you have more than a fair grasp over these commonly confused words.
Question 1 of 7
Which one of these commonly confused words can act as an adverb or a pronoun?

Origin of actinism

First recorded in 1835–45; actin- + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for actinism

Tired of Typos? Get Help Now!