actinic

Of, relating to, resulting from, or showing actinism.

Of or relating to the chemically active rays of the electromagnetic spectrum.

Producing chemical action.

• a. dermatitis — that produced by exposure to actinic radiation, such as that from the sun, ultraviolet waves, or x- or gamma radiation. Called also dermatitis actinica.
• a. radiation — said of rays of light beyond the violet end of the spectrum.

The adjective has one meaning:

Meaning #1: relating to or exhibiting actinism
  Pertains to noun: actinism (meaning #1)