Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instrument for examining the dichroism of crystals.

from the GNU version of the Collaborative International Dictionary of English

  • n. An instrument for examining the dichroism of crystals.

from The Century Dictionary and Cyclopedia

  • n. An instrument for testing the dichroism of crystals, usually consisting of an achromatized double-imago prism of Iceland spar, fixed in a brass tube which has a small square hole at one end and a convex lens at the other, of such power as to give a sharp image of the square hole.

Etymologies

Ancient Greek (Wiktionary)

Examples

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