Thesaurus: biprism

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Definitions

1. n. an optical device for obtaining interference fringes
2. 1. A prism whose refracting angle is very nearly 180 degrees. 2. A combination of two short rectangular glass prisms cemented together at their diagonal faces so as to form a cube; -- called also optical cube. It is used in one form of photometer.
3. A prism whose refracting angle is very nearly 180 degrees.
4. n an optical device for obtaining interference fringes