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See more synonyms for hexagonal on Thesaurus.com
  1. of, relating to, or having the form of a hexagon.
  2. having a hexagon as a base or cross section: a hexagonal prism.
  3. divided into hexagons, as a surface.
  4. 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.
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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. 2018

Related Words


Examples from the Web for hexagonal

Historical Examples

  • One of them he found in a dark crevice had a hexagonal shape that puzzled him.

    All Day September

    Roger Kuykendall

  • I will venture to assign a new reason for the hexagonal form.

  • The pagoda is hexagonal, and counts seven stories and twenty-eight windows.

  • It will be observed that all the forms have a hexagonal character.

  • The hexagonal one contained the rooms where Queen Mary was imprisoned.

    Rollo in Scotland

    Jacob Abbott

British Dictionary definitions for hexagonal


  1. having six sides and six angles
  2. of or relating to a hexagon
  3. 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
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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.

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Online Etymology Dictionary, © 2010 Douglas Harper

hexagonal in Science


  1. Having six sides.
  2. 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.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.