Definition of ultraviolet Ultraviolet

/ʌˌltɹʌvajˈʌlɪt/ - [ultruvayulit] - ul•tra•vi•o•let

We found 9 definitions of ultraviolet from 6 different sources.

What does ultraviolet mean?

WordNet

Noun Plural: ultraviolets
ultraviolet - radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
		ultraviolet radiation, ultraviolet light, ultraviolet illumination, UV
		actinic radiation, actinic ray electromagnetic radiation that can produce photochemical reactions
Adjective
ultraviolet - having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end; "ultraviolet radiation"; "an ultraviolet lamp"
		unseeable, invisible impossible or nearly impossible to see; imperceptible by the eye; "the invisible man"; "invisible rays"; "an invisible hinge"; "invisible mending"

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Wiktionary

ultraviolet (Noun)
Ultraviolet colour.
ultraviolet (Adjective)
Of electromagnetic radiation beyond higher in frequency than light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre.

Webster DictionaryWebster's Unabridged Dictionary 📘

ultraviolet (a.)
Lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum.

OmegaWiki DictionaryOmegaWiki Dictionary Ω

ultraviolet
The invisible part of the light spectrum whose rays have wavelengths shorter than the violet end of the visible spectrum and longer than X rays.
ultraviolet
Of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye.

Wikipedia

Ultraviolet is a color of light which is invisible to people, but can be recognized by many animals, mostly insects, reptiles, and small birds. The frequency of ultraviolet is higher than that of violet light, hence the name 'ultraviolet'.

The name 'ultraviolet' is in part derived from the ancient Latin language. The prefix "ultra-" means 'behind', 'beyond', or 'far'. Ultraviolet is beyond the visible violet light in terms of frequency, wavelength, and energy.

UV is a common abbreviation of ultraviolet, mainly used in technical environments.

Ultraviolet radiation.

Ultraviolet light can be dangerous to one's health. For instance, sunlight contains UV rays that can cause sunburn and lead to various cancers. Industrial UV rays, which often emanate from X-ray machines, can induce cancer and render people infertile.

There is no clear-cut distinction between X-rays and ultraviolet, only that the low-energy, low-frequency, large-wavelength ultraviolet in the neighborhood of visible violet is not suitable for X-raying, whereas the even-higher-energetic, even-higher-frequency, even-shorter-wavelength X-rays are a component of radioactivity which is called gamma rays, or gamma radiation.

Technically, electromagnetic waves with a frequency of 789 terahertz or more are called ultaviolet.

This corresponds with a wavelength from 380 nanometers down to approximaltey 5 nanometers.

A single light quantum of ultraviolet carries an energy around some 3.26 electron volt, the more, the higher its