Acute bisectrix
See under (def 1).
Crystallography. an imaginary line either the acute angle (acute bisectrix) or the obtuse angle (obtuse bisectrix) of the optic axes of a biaxial crystal.
Geometry. a bisector.
noun (pl) bisectrices (baɪˈsɛktrɪˌsiːz)
another name for bisector
the bisector of the angle between the optic axes of a crystal
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