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obtuse bisectrix

noun, Crystallography
1.
See under bisectrix (def 1).
Origin
1895-1900
1895-1900

bisectrix

[bahy-sek-triks] /baɪˈsɛk trɪks/
noun, plural bisectrices
[bahy-sek-trahy-seez] /ˌbaɪ sɛkˈtraɪ siz/ (Show IPA)
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
1850-55; bisec(t) + -trix
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for obtuse bisect rices

bisectrix

/baɪˈsɛktrɪks/
noun (pl) 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
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