octagonal

adjective

oc·​tag·​o·​nal (ˈ)äk¦tagənᵊl 

-taig-

: having eight sides

built a mansion in the shape of an octagon, which started quite a fashion for octagonal houses

—Time

octagonally

-ᵊlē 

-ᵊli

adverb

Word History

Etymology

alteration (influenced by octagon) of earlier octogonal, from Middle French, from octogone octagon (from Latin octagonum, octogonum) + -al

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Rhymes for octagonal

• diagonal
• hexagonal
• tetragonal