Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument for testing the colour perception of the eye, or for comparing different lights in terms of their constituent colour or relative whiteness.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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.

from The Century Dictionary and Cyclopedia

  • n. An optical instrument for testing the eyes for color-blindness, devised by Helmholtz.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

leuco- + -scope

Examples

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