Definition of Illinoian in English:

Illinoian

Line breaks: Illi|noi¦an
Pronunciation: /ˌɪlɪˈnɔɪ(j)ən
 
/

adjective

Geology
  • 1Relating to or denoting a Pleistocene glaciation in North America, preceding the Wisconsin and approximating to the Saale of northern Europe.
    More example sentences
    • This preserve is located on a käme (a hill or mound of stratified drift deposited by glacial meltwater) formed during the Illinoian glacial epoch.
    • These well-drained, sloping soils developed on Illinoian glacial till overlain with loess and have a compact fragipan that restricts root growth.
    • The forest studied in Pike County, Illinois was on Illinoian glacial till in the Glaciated Section of the Mississippi River Border Division.
  • 1.1 (as noun the Illinoian) The Illinoian glaciation or the system of deposits laid down during it.

Origin

mid 19th century: from Illinois + -an.

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