Illinoian

[ il-uh-noi-uhn ]

noun

1. Geology. the third stage of the glaciation of North America during the Pleistocene.
2. Illinoisan.

adjective

1. Geology. of or relating to the Illinoian stage.
2. Illinoisan.

Word History and Origins

Origin of Illinoian¹

An Americanism dating back to 1825–35; Illinoi(s) + -an

Example Sentences

The ancient channel which it held along the Illinoian ice front has been traced through southeastern Iowa for many miles.

From Project Gutenberg

Specific identification of the Illinoian pocket gophers is uncertain, primarily due to the fragmentary nature of the material.

From Project Gutenberg