actinic rays

noun plural

Medical Definition of actinic rays

: radiation (as in the violet and ultraviolet parts of the spectrum) having marked photochemical action

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“Actinic rays.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/actinic%20rays. Accessed 1 Dec. 2020.

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