Webster
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Webster’s Revised Unabridged Dictionary · 1913

Projector

Pro·jec′tor, n. An optical instrument for projecting a picture upon a screen, as by a magic lantern or by an instrument for projecting (by reflection instead of transmission of light) a picture of an opaque object, as photographs, picture post-cards, insects, etc., in the colors of the object itself. In this latter form the projection is accomplished by means of a combination of lenses with a prism and a mirror or reflector. Specific instruments have been called by different names, such as radiopticon, mirrorscope, balopticon, etc.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.