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Leucoscope

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Leucoscope \Leu"co*scope\ (l[=u]"k[-o]*sk[=o]p), n. [Leuco- +
   -scope.] (Physics)
   An instrument, devised by Professor Helmholtz, for testing
   the color perception of the eye, or for comparing different
   lights, as to their constituent colors or their relative
   whiteness.
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