ir·i·des·cence /ˌɪrəˈdɛsṇ(t)s/
  彩虹色
  ir·i·des·cence /-ṇ(t)s/ 名詞
  虹彩,虹色,暈色
  Ir·i·des·cence n.  Exhibition of colors like those of the rainbow, especially a surface reflection which changes color with the angle at which the object is viewed; the quality or state of being iridescent; a prismatic play of color; as, the iridescence of mother-of-pearl.  It is due to interference of light waves reflected from the front and back surfaces of a thin layer transpatrent or semitransparent film.
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  iridescence
       n : the visual property of something having a milky brightness
           [syn: opalescence]