actinic ray

noun Physics.

a ray of light of short wavelengths, as ultraviolet or violet, that produces photochemical effects.

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Nearby words

actinic cheilitis, actinic dermatitis, actinic elastosis, actinic granuloma, actinic keratosis, actinic ray, actinide, actinide series, actiniform, actinin, actinism

Origin of actinic ray

First recorded in 1835–45

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019