octagonian

== English == === Etymology === From octagon +‎ -ian. === Pronunciation === (Received Pronunciation) IPA(key): /ˌɒk.təˈɡəʊ.ni.ən/ (General American) IPA(key): /ˌɑk.təˈɡoʊ.ni.ən/ Rhymes: -əʊniən === Adjective === octagonian (not comparable) Relating to an octagon