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acute bisectrix

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noun Crystallography.
  1. See under bisectrix(def 1).

bisectrix

[bahy-sek-triks]
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.

Origin of bisectrix

First recorded in 1850–55; bisec(t) + -trix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for acute bisectrix

bisectrix

noun plural bisectrices (baɪˈsɛktrɪˌsiːz)
  1. another name for bisector
  2. the bisector of the angle between the optic axes of a crystal
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012