Definition of Aftonian in English:

Aftonian

adjective

Geology
  • Of, relating to, or designating an interglacial stage of the early Pleistocene in North America, between the Nebraskan and Kansan glaciations.

noun

Geology
  • With the. The Aftonian interglacial or its deposits.

Origin

Late 19th century. From Afton, the name of a town in Iowa, U.S.A., where an exposure of these deposits was found + -ian.

Pronunciation:

Aftonian

/afˈtəʊnɪən/