obtuse bisectrix

noun Crystallography.

  1. See under bisectrix(def 1).

noun, plural bi·sec·tri·ces [bahy-sek-trahy-seez] /ˌbaɪ sɛkˈtraɪ siz/.

  1. Crystallography. an imaginary line bisecting either the acute angle (acute bisectrix) or the obtuse angle (obtuse bisectrix) of the optic axes of a biaxial crystal.
  2. Geometry. a bisector.

noun plural bisectrices (baɪˈsɛktrɪˌsiːz)

  1. another name for bisector
  2. the bisector of the angle between the optic axes of a crystal

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