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projector (n.)

1590s, "one who forms a project or projects," agent noun in Latin form from project (v.). In the sense of "camera with a light source for throwing an image on a screen" it is attested from 1884.

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Definitions of projector from WordNet

projector (n.)
an optical device for projecting a beam of light;
projector (n.)
an optical instrument that projects an enlarged image onto a screen;
From wordnet.princeton.edu