re·frac·tom·e·ter /ˌriˌfrækˈtɑmətɚ/
折射計
re·frac·tom·e·ter /ˌrɪˌfrækˈtɑmətɚ, rɪ-/ 名詞
折光計,折射計,屈光計
Re·frac·tom·e·ter n. Opt. A contrivance for exhibiting and measuring the refraction of light.
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refractometer
n : measuring instrument for measuring the refractive index of a
substance