decagon

[ dek-uh-gon, -guh n ]
/ ˈdɛk əˌgɒn, -gən /

noun Geometry.

a polygon having ten angles and ten sides.

Origin of decagon

From the Medieval Latin word decagōnum, dating back to 1565–75. See deca-, -gon
Related formsde·cag·o·nal [duh-kag-uh-nl] /dəˈkæg ə nl/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for decagon

decagon

/ (ˈdɛkəˌɡɒn) /

noun

a polygon having ten sides
Derived Formsdecagonal (dɪˈkæɡənəl), adjectivedecagonally, 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 decagon

decagon


n.

early 17c., from Modern Latin decagonum, from Greek dekagonon, from deka "ten" (see ten) + gonia "corner, angle" (see knee (n.)).

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for decagon

decagon

[ dĕkə-gŏn′ ]

A polygon having ten sides.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.