Bisectrix

• (n.) The line bisecting the angle between the optic axes of a biaxial crystal.
Found on http://thinkexist.com/dictionary/meaning/bisectrix/

Bisectrix

Bi┬Ěsec'trix noun The line bisecting the angle between the optic axes of a biaxial crystal.
Found on http://www.encyclo.co.uk/webster/B/57
No exact match found