Pronunciation: (mis"u-sip'ē-un),[key] —adj. 1. of or pertaining to the state of Mississippi or the Mississippi River.
2. Geol.noting or pertaining to a period of the Paleozoic Era, occurring from about 345 million to 310 million years ago and characterized as the age of amphibians. See table under geologic time.
—n. 1. a native or inhabitant of Mississippi.
2. Geol.the Mississippian Period or System: the former is sometimes considered an epoch of the Carboniferous Period.