Bi"prism (?), n. [Pref. bi- + prism.]


A prism whose refracting angle is very nearly 180 degrees.


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.


© Webster 1913.

Log in or register to write something here or to contact authors.