Hu|ro|ni|an

Hu|ro|ni|an «hyu ROH nee uhn», adjective, noun. Geology.

–adj.

of or having to do with a system of rocks discovered north of Lake Huron or with the geological period in which these rocks originated.

–n.

1. this system.

2. the geological period in which it originated, a subdivision of the Proterozoic Era.