ultraviolet

IPA/ˌʌltrəˈvaɪələt/
KK[ˌʌltrəvˈaɪəlɪt]IPA/ˌʌltrəˈvaɪələt/

ultraviolet — adjective

  • ultravioletpositive
  • more ultravioletcomparative
  • most ultravioletsuperlative

1. describing a type of light that comes from the sun or from special lamps, with a

1.形容詞B2
釋義

describing a type of light that comes from the sun or from special lamps, with a wavelength too short for human eyes to see, and that can burn the skin or make it darker when people stay outdoors too long

例句

Meera always wears a wide-brimmed hat to block out ultraviolet rays at the beach.

collocation: ultraviolet rays / ultraviolet light

The optician used an ultraviolet lamp to check for scratches on Gabriel's glasses.

collocation: ultraviolet lamp

同義詞
  • UV

    common abbreviation used on product labels and in weather forecasts; less formal than the full form

反義詞
  • infrared

    describes light at the opposite end of the invisible spectrum, with wavelengths longer than red light, felt as heat

文法句型

ultraviolet + noun

be + ultraviolet

用法筆記

Frequently abbreviated to UV in everyday product labels, weather reports, and informal writing — for example, UV index, UV protection, UV light. The full form ultraviolet is preferred in formal and scientific contexts.

常見錯誤

❌The ultraviolet is very strong today.
✅The UV light is very strong today.
💡ultraviolet is an adjective; use ultraviolet light / UV light / ultraviolet radiation as a noun phrase.
❌Infrared light comes from the same part of the spectrum as ultraviolet light.
✅Infrared and ultraviolet light are at opposite ends of the visible spectrum
💡infrared has longer wavelengths, ultraviolet has shorter wavelengths.' — Infrared and ultraviolet are not the same and should not be used interchangeably.