Illinoian
[ il-uh-noi-uh n ]
/ ˌɪl əˈnɔɪ ən /
noun
Geology.
the third stage of the glaciation of North America during the Pleistocene.
adjective
Geology.
of or relating to the Illinoian stage.
Origin of Illinoian
An Americanism dating back to 1825–35;
Illinoi(s) +
-an
Example sentences from the Web for illinoian
The ancient channel which it held along the Illinoian ice front has been traced through southeastern Iowa for many miles.
The Elements of Geology |William Harmon NortonSpecific identification of the Illinoian pocket gophers is uncertain, primarily due to the fragmentary nature of the material.