Camera lucida

noun

Definitions

Noun
  1. 1
    An instrument that uses a shaped prism or mirrors to cause an apparent image of external objects to appear as if projected upon a plane surface, so that the outlines may be conveniently traced.
  2. 2
    an optical device consisting of an attachment that enables an observer to view simultaneously the image and a drawing surface for sketching it wordnet

Etymology

Latin camera lucida

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