Definitions for "Algonkian"
Var. of Algonquian.
a member of a North American Indian people in the Ottawa river valley of Ontario and Quebec
the Algonquian language spoken by the Algonkian people
Pertaining to or designating a period or era recognized by the United States Geological Survey and some other authorities, between the Arch├Žan and the Paleozoic, from both of which it is generally separated in the record by unconformities. Algonkian rocks are both sedimentary and igneous. Although fossils are rare, life certainly existed in this period.
The Algonkian period or era, or system or group of systems.