'Subcarboniferous' definitions:

Definition of 'Subcarboniferous'

From: GCIDE

Subcarboniferous \Sub*car`bon*if"er*ous\, a. (Geol.) Of or pertaining to the lowest division of the Carboniferous formations underlying the proper coal measures. It was a marine formation characterized in general by beds of limestone. -- n. The Subcarboniferous period or formation. [1913 Webster]