noun
a major division of geological time; an era is usually divided into two or more periods
• Syn: ↑era
• Hypernyms: ↑geological time, ↑geologic time
• Instance Hyponyms:
↑Cenozoic, ↑Cenozoic era, ↑Age of Mammals, ↑Mesozoic, ↑Mesozoic era, ↑Age of Reptiles, ↑Paleozoic, ↑Paleozoic era
• Part Meronyms: ↑period, ↑geological period
Useful english dictionary. 2012.