UV -abbr

  1. ultraviolet

UVA [,yü-(,)vē-'ā] -n

  1. radiation that is in the region of the ultraviolet spectrum which extends from about 320 to 400 nm in wavelength and that causes tanning and contributes to aging of the skin

Uval·ue ['yü-,val-(,)yü] -n

  1. a measure of the heat transmission through a building part (as a wall or window) or a given thickness of a material (as insulation) with lower numbers indicating better insulating properties

uva·rov·ite [yü-'vär-ə-,vīt, ü-] -n

  1. an emerald green calcium-chromium garnet

UVB [,yü-(,)vē-'bē] -n

  1. radiation that is in the region of the ultraviolet spectrum which extends from about 280 to 320 nm in wavelength and that is primarily responsible for sunburn, aging of the skin, and the development of skin cancer

UVC [,yü-(,)vē-'sē] -n

  1. radiation that is in the region of the ultraviolet spectrum which extends from about 200 to 280 nm in wavelength and that is more hazardous than UVB but is mostly absorbed by earth's upper atmosphere

uvea ['yü-vē-ə] -n, adj

  1. the pigmented middle layer of the eye consisting of the iris and ciliary body together with the choroid

uve·itis [,yü-vē-'ī-təs] -n

  1. inflammation of the uvea

uvu·la ['yü-vyə-lə] -n

  1. the pendent fleshy lobe in the middle of the posterior border of the soft palate

uvu·lar [-lər] -adj

  1. of or relating to the uvula
    • uvular glands
  2. produced with the aid of the uvula
    • a uvular sound