geological period

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a unit of geological time during which a system of rocks formed
- ganoid fishes swarmed during the earlier geological periods
• Syn:
period
• Hypernyms:
geological time, geologic time
• Hyponyms:
ice age, glacial period, glacial epoch
• Instance Hyponyms:
Quaternary, Quaternary period, Age of Man, Tertiary, Tertiary period,
Cretaceous, Cretaceous period, Jurassic, Jurassic period, Triassic, Triassic period,
Permian, Permian period, Carboniferous, Carboniferous period, Pennsylvanian, Pennsylvanian period,
Upper Carboniferous, Upper Carboniferous period, Mississippian, Missippian period, Lower Carboniferous, Lower Carboniferous period,
Devonian, Devonian period, Age of Fishes, Silurian, Silurian period, Ordovician,
Ordovician period, Cambrian, Cambrian period
• Part Holonyms:
era, geological era
• Part Meronyms:
epoch