Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A reflecting telescope, part of which is made to rotate eccentrically, so as to produce a ringlike image of a star, instead of a point; used in studying the scintillation of the stars.

from the GNU version of the Collaborative International Dictionary of English

  • n. A reflecting telescope, part of which is made to rotate eccentrically, so as to produce a ringlike image of a star, instead of a point; -- used in studying the scintillation of the stars.

from The Century Dictionary and Cyclopedia

  • n. An instrument for compounding colors by combining the light reflected from different colored surfaces.

Etymologies

Ancient Greek (Wiktionary)

Examples

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