obtuse-bisectrix

obtuse bisectrix

noun Crystallography.
See under bisectrix ( def 1 ).

Origin:
1895–1900

Dictionary.com Unabridged

bi·sec·trix

[bahy-sek-triks]
noun, plural bi·sec·tri·ces [bahy-sek-trahy-seez] .
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. 2013.
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World English Dictionary
bisectrix (baɪˈsɛktrɪks) [Click for IPA pronunciation guide]
 
n , pl bisectrices
1.  another name for bisector
2.  the bisector of the angle between the optic axes of a crystal

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