noun
from 310 million to 280 million years ago; warm climate; swampy land
• Syn: ↑Pennsylvanian, ↑Pennsylvanian period, ↑Upper Carboniferous
• Instance Hypernyms: ↑period, ↑geological period
• Part Holonyms: ↑Carboniferous, ↑Carboniferous period
Useful english dictionary. 2012.