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Từ điển Oxford Learners Wordfinder Dictionary
geological period


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


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