octagonal

[ ok-tag-uh-nl ]

/ ɒkˈtæg ə nl /

SEE MORE SYNONYMS FOR octagonal ON THESAURUS.COM

adjective

having eight angles and eight sides.

RELATED WORDS

octennial

Nearby words

Origin of octagonal

1565–75; octagon + -al¹, replacing earlier octogonal < New Latin octōgōnālis, equivalent to octō- octo- + Greek gōn(ía) angle + -ālis -al¹

Related formsoc·tag·o·nal·ly, adverb

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for octagonal

This is an octagonal building, with a large vestibule and a small apsidal choir.
Architecture|Thomas Roger Smith
The chimneys, except for the octagonal red-brick base, are constructed of the radial perforated bricks.
The New York Subway|Anonymous
This end has also two octagonal turrets, the upper stories of which are ornamented with open-worked panels and crocketted domes.
Chelsea|George Bryan
Warren claimed a ditched town, octagonal in shape, measuring in perimeter one thousand three hundred and eighty-five feet.
Stories of Old Kentucky|Martha Grassham Purcell

The double base is octagonal, with corners strengthened by columns and pilasters and executed with much artistic skill.
Cathedrals of Spain|John A. (John Allyne) Gade

British Dictionary definitions for octagonal

octagonal

/ (ɒkˈtæɡənəl) /

adjective

having eight sides and eight angles

of or relating to an octagon

Derived Formsoctagonally, 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 octagonal