Scioptic \Sci*op"tic\, a. [Gr. ? shadow + ? belonging to sight: cf. F. scioptique. See Optic.]

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

Scioptic ball (Opt.), 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.

Source: Webster's Revised Unabridged Dictionary (1913)