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2017 Word of the Year

actinism

[ak-tuh-niz-uh m] /ˈæk təˌnɪz əm/
noun
1.
the property of radiation by which chemical effects are produced.
Origin of actinism
1835-1845
First recorded in 1835-45; actin- + -ism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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12
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