era
Listen:Concise Oxford English Dictionary © 2008 Oxford University Press:
era /ˈɪərə/
▶noun a long and distinct period of history.
■ Geology a major division of time that is a subdivision of an aeon and is itself subdivided into periods.
– origin C17: from late L. aera, denoting a number used as a basis of reckoning, an epoch from which time is reckoned, pl. of aes, aer- ‘money, counter’.
'era' also found in these Oxford entries:
age
- BC
- BCE
- BP
- Cambrian
- Carboniferous
- CE
- Cenozoic
- Christian era
- Common Era
- Cretaceous
- Devonian
- ethos
- eurypterid
- glyptodont
- ground sloth
- Hegira
- Hercynian
- ichthyosaur
- Jurassic
- koine
- masher
- Mesozoic
- millenarian
- Ordovician
- Palaeozoic
- period
- Permian
- plesiosaur
- quaternary
- Silurian
- space age
- tertiary
- tide
- Triassic
- trilobite
