actinic
/ækˈtɪn ɪk/ adjective
- adjective Related to radiation; used most often in reference to light, especially in the ultraviolet range.
- adjective (by extension) Harsh and bright, especially blindingly so.
- adjective (medicine) Caused by extensive exposure to ultraviolet light. “In medicine, actinic keratoses usually occur in sundamaged skin and exhibit hyperkeratosis.”
- adjective (chemistry, photography) Of or relating to actinism, the range of photochemical effects produced by exposure to electromagnetic radiation, particularly sunlight.
- adjective Composed of actin.
Etymology
From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”) + -ic.
Webster’s 1913
- adjective Of or pertaining to actinism; as, actinic rays.
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “actinic”, CC BY-SA 4.0. Details