biaxial indicatrix

biaxial indicatrix

[bī′ak·sē·əl in′dik·ə‚triks]
(crystallography)
An ellipsoid whose three axes at right angles to each other are proportional to the refractive indices of a biaxial crystal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.