[yoo-nee-ak-see-uh l]
  1. having one axis.
  2. Crystallography. (of a crystal) having one direction in which double refraction does not occur.
  3. Botany. (of a plant) having a primary stem that does not branch and that terminates in a flower.

Origin of uniaxial

First recorded in 1820–30; uni- + axial
Related formsu·ni·ax·i·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for uniaxially


  1. (esp of plants) having an unbranched main axis
  2. (of a crystal) having only one direction along which double refraction of light does not occur
Derived Formsuniaxially, adverb
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