- having two axes.
- Crystallography. having two optical axes along which double refraction does not occur.
Origin of biaxial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- (esp of a crystal) having two axes
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
Word Origin and History for biaxial
Online Etymology Dictionary, © 2010 Douglas Harper