actinic.
Related to radiation; used most often in reference to light, especially in the ultraviolet range.
Meaning & usage
Related to radiation; used most often in reference to light, especially in the ultraviolet range.
Harsh and bright, especially blindingly so.
Caused by extensive exposure to ultraviolet light.
In medicine, actinic keratoses usually occur in sundamaged skin and exhibit hyperkeratosis.
Of or relating to actinism, the range of photochemical effects produced by exposure to electromagnetic radiation, particularly sunlight.
Composed of actin.
Where this word comes from
From Ancient Greek ἀκτίς, ἀκτῖν- (aktís, aktîn-, “ray”) + -ic.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.