from The Century Dictionary and Cyclopedia

  • n. A piece of colored glass interposed between the eye and the object-glass of an astronomical instrument, usually before the eyepiece, to reduce the apparent brightness of the sun or other object under observation.


Sorry, no etymologies found.


  • Mr. Hodgson, at a distance of many miles, was at the same time sketching details of sun-spot structure by means of a solar eye-piece and shade-glass.

    The Story of the Heavens


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