Ultraviolet Visible Radiation Violet Adjective End Shorter Light

ul·tra·vi·o·let
\\ˌəl-trə-ˈvī-(ə-)lət\\ adjective1. situated beyond the visible spectrum at its violet end — used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2. relating to, producing, or employing ultraviolet radiation
• ultraviolet noun

ultraviolet
  "beyond the violet end of the visible spectrum," 1840, from ultra- + violet. Ultra-red (1870) was a former name for what now is called infra-red.

ultraviolet
ultra·vio·let / 7QltrE5vaiElEt / (abbr. UV)adjective [usually before noun]
   (physics 物) of or using

electromagnetic

waves that are just shorter than those of

violet

light in the

spectrum

and that cannot be seen
   紫外线的；利用紫外线的:
   ultraviolet rays (= that cause the skin to go darker)
   紫外线
   an ultraviolet lamp
   紫外线灯
⇨ compare

infrared

ul·tra·violet
I. \“+\ adjective
Etymology: ultra- + violet
1. of radiation : beyond the visible spectrum at its violet end : having a wavelength shorter than those of visible light and longer than those of X rays — compare
2. : relating to, producing, or employing ultraviolet radiation
 < ultraviolet lamp >
 < ultraviolet filter >
II. noun
: ultraviolet radiation

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