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1. Having only one axis.
2. Of, relating to, or affecting one axis.
3. Having one direction along which double refraction of light does not take place. Used of a crystal.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Biology) (esp of plants) having an unbranched main axis
2. (Chemistry) (of a crystal) having only one direction along which double refraction of light does not occur
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
u•ni•ax•i•al(ˌyu niˈæk si əl)
1. having one axis.
2. (of a crystal) having one direction in which double refraction does not occur.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.