era

views updated

e·ra / ˈi(ə)rə; ˈerə/ • n. a long and distinct period of history with a particular feature or characteristic: the era of glasnost. ∎  a system of chronology dating from a particular noteworthy event: the dawn of the Christian era. ∎  Geol. a major division of time that is a subdivision of an eon and is itself subdivided into periods: the Mesozoic era.

era

views updated

era First-order geologic time unit composed of several periods. The Mesozoic Era, for example, is composed of the Triassic, Jurassic, and Cretaceous Periods. When used formally, as above, the initial letter of the term is capitalized.

era

views updated

era A first-order geological time unit composed of several periods. The Mesozoic Era, for example, is composed of the Triassic, Jurassic, and Cretaceous Periods, dating from approximately 248 Ma to 65 Ma. When used formally the initial letter is capitalized. The equivalent chronostratigraphic unit is the erathem.

era

views updated

era A first-order geological time unit composed of several periods. The Mesozoic Era, for example, is composed of the Triassic, Jurassic, and Cretaceous Periods, dating from approximately 248 Ma to 65 Ma. When used formally, the initial letter is capitalized.

ERA

views updated

ERA Baseball earned run average
• (USA) Economic Regulatory Administration
• Education Reform Act (1988)
• Electrical Research Association
• electronic reading automation
• Electronic Rentals Association
• (USA) Emergency Relief Administration
• engine-room artificer
• Computing entity relationship attribute (as in ERA diagram, ERA model)
• (USA) Equal Rights Amendment
• European Ramblers' Association
• Evangelical Radio Alliance

ERA

views updated

ERA • abbr. ∎ Baseball earned run average. ∎  Equal Rights Amendment.

era

views updated

era system of chronology reckoned from a point of time; date from which a period is reckoned XVII; period or epoch XVIII. — late L. æra, orig. pl. of æs æris copper, in the sense ‘counters (for calculation)’, used as fem. sg. for ‘number used as a basis of reckoning’, ‘epoch from which time is reckoned’.