ultraviolet
/ˌʌltɹəˈvaɪələt/ adjective, noun
Forms ultraviolets
- adjective Of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 to 10 nanometres.
- adjective (figurative, physics) Relating to very high energies or very small distances or time spans.
- noun Ultraviolet colour.
Synonyms
ultraviolet radiation ultraviolet light ultraviolet illumination UV
Antonyms
Etymology
From ultra- (“beyond”) + violet (“violet”).
Webster’s 1913
- adjective Lying outside the visible spectrum at its violet end; --said of rays more refrangible than the extreme violet rays of the spectrum.
Etymology [Pref. ultra- + violet.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “ultraviolet”, CC BY-SA 4.0. Details