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a combining form meaning “angled,” “angular,” used in the formation of compound words:
polygon; pentagon.
Compare gonio-.
Origin of -gon
< Greek -gōnos, derivative of gōnía angle, akin to góny knee Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -gon


combining form
indicating a figure having a specified number of angles: pentagon
Word Origin
from Greek -gōnon, from gōnia angle
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
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