'Camera lucida' definitions:
Definition of 'camera lucida'
(from WordNet)
noun
An optical device consisting of an attachment that enables an observer to view simultaneously the image and a drawing surface for sketching it
Definition of 'Camera lucida'
From: GCIDE
- Camera lucida \Cam"e*ra lu"ci*da\ [L. camera chamber + L. lucidus, lucida, lucid, light.] (Opt.) An instrument which by means of a prism of a peculiar form, or an arrangement of mirrors, causes an apparent image of an external object or objects to appear as if projected upon a plane surface, as of paper or canvas, so that the outlines may conveniently traced. It is generally used with the microscope. [1913 Webster]