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(Science: optics) Of or pertaining to an optical arrangement for forming images in a darkened room, usually called scioptic ball.

(Science: optics) Scioptic ball, the lens of a camera obscura mounted in a wooden ball which fits a socket in a window shutter so as to be readily turned, like the eye, to different parts of the landscape.

Origin: Gr. Shadow _ belonging to sight: cf. F. Scioptique. See Optic.