[ hek-sag-uh-nl ]
/ hɛkˈsæg ə nl /


of, relating to, or having the form of a hexagon.
having a hexagon as a base or cross section: a hexagonal prism.
divided into hexagons, as a surface.
Crystallography. noting or pertaining to a system of crystallization in which three equal axes intersect at angles of 60° on one plane, and the fourth axis, of a different length, intersects them perpendicularly.


Origin of hexagonal

First recorded in 1565–75; hexagon + -al1
Related formshex·ag·o·nal·ly, adverbpseu·do·hex·ag·o·nal, adjectivepseu·do·hex·ag·o·nal·ly, adverbsub·hex·ag·o·nal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hexagonal

British Dictionary definitions for hexagonal


/ (hɛkˈsæɡənəl) /


having six sides and six angles
of or relating to a hexagon
crystallog relating or belonging to the crystal system characterized by three equal coplanar axes inclined at 60° to each other and a fourth longer or shorter axis at right angles to their planeSee also trigonal
Derived Formshexagonally, 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

Word Origin and History for hexagonal



1570s, from hexagon + -al (1). Related: Hexagonally.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for hexagonal


[ hĕk-săgə-nəl ]

Having six sides.
Relating to a crystal having three axes of equal length intersecting at angles of 60° in one plane, and a fourth axis of a different length that is perpendicular to this plane. The mineral calcite has hexagonal crystals. See illustration at crystal.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.