ultra·vio·letBrE/ˌʌltrəˈvaɪələt/NAmE/ˌʌltrəˈvaɪələt/ (abbreviationUV) adjective[usually before noun] (physics物理) oforusingelectromagnetic waves that are just shorter than those of violet light in the spectrumandthatcannotbeseen紫外线的；利用紫外线的◆ultravioletrays(= thatcausetheskintogodarker)紫外线◆anultravioletlamp紫外线灯➡ compareinfrared