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Definition of Actinic
1. Adjective. Relating to or exhibiting actinism.
Definition of Actinic
1. a. Of or pertaining to actinism; as, actinic rays.
Definition of Actinic
1. pertaining to actinism [adj] - See also: actinism
Medical Definition of Actinic
1. Relating to the chemically active rays of the electromagnetic spectrum. Origin: G. Aktis (aktin-), a ray (05 Mar 2000)