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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 biprism
 雙稜鏡; 雙稜柱體

From: Webster's Revised Unabridged Dictionary (1913)

 Bi·prism n.
 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.
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From: WordNet (r) 2.0

 biprism
      n : an optical device for obtaining interference fringes