Lower Carboniferous lo·wer·car·boniferous uncommon noun 1. from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects SynonymsMississippianMissippian periodLower CarboniferousLower Carboniferous period Related words Word family Lower Carboniferous period Broader terms period Parts Carboniferous WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
