Princeton's WordNet

1. octangular, octagonal(adj)

   of or relating to or shaped like an octagon

Wiktionary

1. octagonal(Adjective)

   Shaped like an octagon, in having eight sides and eight angles.

• agthoekigAfrikaans
• مُثَمَّن الشَّكْلArabic
• осмоъгъленBulgarian
• octogonalPortuguese (BR)
• osmiboký, osmiúhlýCzech
• achteckigGerman
• ottekantetDanish
• οκταγωνικόςGreek
• octagonalSpanish
• kaheksanurkneEstonian
• هشت ضلعیFarsi
• kahdeksankulmainenFinnish
• octogonalFrench
• בְּצוּרַת מְתוּמָןHebrew
• अष्टकोनीयHindi
• osmerokutniCroatian
• nyolcszögűHungarian
• bersegi delapanIndonesian
• átthyrndurIcelandic
• ottagonaleItalian
• ８角形のJapanese
• 8각형의Korean
• aštuonkampisLithuanian
• astoņstūru-Latvian
• berbentuk oktagonMalay
• achthoekigDutch
• åttekantet, oktagonalNorwegian
• ośmiobocznyPolish
• هشت ضلعیPersian
• اته ګونىPashto
• octagonalPortuguese
• octogonalRomanian
• восьмиугольныйRussian
• osemuhlýSlovak
• osmerokotenSlovenian
• osmougaoniSerbian
• åttahörnig, åttakantigSwedish
• แปดเหลี่ยมThai
• sekiz kenarlıTurkish
• 八邊形的Chinese (Trad.)
• восьмикутнийUkrainian
• ہشت پہلوUrdu
• bát giácVietnamese
• 八边形的Chinese (Simp.)