decagon
noun
a polygon having ten angles and ten sides.
decagons
-
pluralof decagon.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
A. Because it has ten sides and ten angles, and there are both regular and irregular decagons.
From The Infant System For Developing the Intellectual and Moral Powers of all Children, from One to Seven years of Age by Wilderspin, Samuel
Of nouns in on, derived from Greek, the greater part always form the plural regularly; as, etymons, gnomons, ichneumons, myrmidons, phlegmons, trigons, tetragons, pentagons, hexagons, heptagons, octagons, enneagons, decagons, hendecagons, dodecagons, polygons.
From The Grammar of English Grammars by Brown, Goold
