Definition of "stereoscope"
An instrument used for viewing pairs of stereoscopic photographs.
Quotations
The idea has been repeated under different aspects; sometimes, possibly, it has been repeated too often; but different aspects in such a case do help, as in a stereoscope, to give solidity to the thing seen.
1920, Edward Carpenter, Pagan and Christian Creeds, New York: Harcourt, Brace and Co., published 1921, page 17