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Commentary Index | Return to PrayerRequest.com | DownloadNoah Webster Dictionary (1913 edition): Biprism
Subjects in this Topic:
(1):
(n.) 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.
(2):
(n.) A prism whose refracting angle is very nearly 180 degrees.