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WordReference Random House Learner's Dictionary of American English © 2024ul•tra•vi•o•let /ˌʌltrəˈvaɪəlɪt/USA pronunciation adj. - Physicsrelating to light having wavelengths shorter than visible light but longer than x-rays.
- Physicsproducing or using light having such wavelengths:an ultraviolet lamp.Compare infrared.
n. [uncountable] - Physicsultraviolet radiation.
See -ult-. WordReference Random House Unabridged Dictionary of American English © 2024ul•tra•vi•o•let (ul′trə vī′ə lit),USA pronunciation adj. - Physicsbeyond the violet in the spectrum, corresponding to light having wavelengths shorter than 4000 angstrom units.
- Physicspertaining to, producing, or utilizing light having such wavelengths:an ultraviolet lamp.Cf. infrared.
n. - Physicsultraviolet radiation.
Collins Concise English Dictionary © HarperCollins Publishers:: ultraviolet /ˌʌltrəˈvaɪəlɪt/ n - the part of the electromagnetic spectrum with wavelengths shorter than light but longer than X-rays; in the range 0.4 × 10–6 and 1 × 10–8 metres
adj - of, relating to, or consisting of radiation lying in the ultraviolet: ultraviolet radiation
Abbreviation: UV
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