actinic

English

From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”) +‎ -ic.

actinic (not comparable)

Related to radiation; used most often in reference to light, especially in the ultraviolet range.
(by extension) Harsh and bright.
- 1999, Jody Lynn Nye, School of Light:
  He bounded over cresting waves that shone in the actinic glare.
(medicine) Caused by extensive exposure to ultraviolet light.
In medicine, actinic keratoses usually occur in sundamaged skin and exhibit hyperkeratosis.^[1]
(chemistry, photography) Of or relating to actinism, the range of photochemical effects produced by exposure to EM radiation, particularly sunlight.
- 1883, Abraham Cowley Malley, Micro-photography: Including a Description of the Wet Collodion and Gelatino-Bromide Processes, page 32:
  It should be borne in mind that the actinic power of the sun is subject to considerable variations, due to its elevation above the horizon.
- 1943 May and June, Chas. S. Lake, “Some Continental Travel Experiences (1922-1939)—III”, in Railway Magazine, page 141:
  I got my picture, and it turned out quite a good one, despite the rather poor light which at that time of day, 7 p.m., was lacking in actinic value.
Composed of actin.

relating to actinism

^ Kumar, Vinay; Abbas, Abul K Abul.; Aster, Jon (2015) Robbins and Cotran Pathologic Basis of Disease (9th ed.). Saunders Elsevier. p. 1154 →ISBN

actinic m or n (feminine singular actinică, masculine plural actinici, feminine and neuter plural actinice)

		masculine	feminine	masculine	neuter
		singular		plural
nominative- accusative	indefinite	actinic	actinică	actinici	actinice
nominative- accusative	definite	actinicul	actinica	actinicii	actinicele
genitive- dative	indefinite	actinic	actinice	actinici	actinice
genitive- dative	definite	actinicului	actinicei	actinicilor	actinicelor