re·frac·tive /rɪˈfræktɪv/
 (a.)折射的,有折射力的,屈折的
 re·frac·tive /rɪˈfræktɪv/ 形容詞
 折射的,折光的,屈折的
 Re·fract·ive a.  Serving or having power to refract, or turn from a direct course; pertaining to refraction; as, refractive surfaces; refractive powers.
 Refractive index. Opt. See Index of refraction, under Index.
 Absolute refractive index Opt., the index of refraction of a substances when the ray passes into it from a vacuum.
 Relative refractive index (of two media) Opt., the ratio of the sine of the angle of incidence to the sine of the angle of refraction for a ray passing out of one of the media into the other.
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 refractive
      adj 1: of or relating to or capable of refraction; "the refractive
             characteristics of the eye" [syn: refractile]
      2: capable of changing the direction (of a light or sound wave)
         [syn: deflective]