Century Dictionary and Cyclopedia
- n teinoscope An optical instrument invented by Sir David Brewster, consisting of two prisms so combined as to correct the chromatic aberration, while the dimensions of objects seen through them are increased or decreased in the plane of refraction. Amici's prism-telescope consists of two such teinoscopes arranged consecutively, with their planes of refraction perpendicular to each other.
Chambers's Twentieth Century Dictionary
- n Teinoscope tī′nō-skōp an optical instrument consisting of two prisms so combined as to correct the chromatic aberration.