Lower Carboniferous

Từ điển WordNet v3.1 - WordNet Dictionary

noun

from 345 million to 310 million years ago;
increase of land areas;
primitive ammonites;
winged insects
• Syn:
Mississippian, Missippian period, Lower Carboniferous period
• Instance Hypernyms:
period, geological period
• Part Holonyms:
Carboniferous, Carboniferous period