Aftonian

== English == === Etymology === From Afton +‎ -ian. === Pronunciation === (Received Pronunciation) IPA(key): /æfˈtəʊ.ni.ən/ (General American) IPA(key): /æfˈtoʊ.ni.ən/ Rhymes: -əʊniən === Adjective === Aftonian (not comparable) (obsolete, geology) During the first interglacial period in North America, between the Kansan and Nebraskan glacial periods.