acute bisectrix

acute bisectrix
Crystall.
See under bisectrix (def. 1).

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  • acute bisectrix — noun : the bisectrix of the acute angle formed by the axes of a biaxial crystal * * * Crystall. See under bisectrix (def. 1) …   Useful english dictionary

  • bisectrix — /buy sek triks/, n., pl. bisectrices /buy sek truy seez/. 1. Crystall. 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. Geom. a bisector. [1850… …   Universalium

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  • declination — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

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  • Refraction — Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different… …   The Collaborative International Dictionary of English

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