A period of time reckoned from some particular date or epoch; a succession of years dating from some important event; as, the era of Alexander; the era of Christ, or the Christian era (see under Christian)
a period marked by distinctive character or reckoned from a fixed point or event
You can refer to a period of history or a long period of time as an era when you want to draw attention to a particular feature or quality that it has. the nuclear era It was an era of austerity. = age. Equal Rights Amendment a suggested change to US law, which was intended to give women the same legal rights as men. Although the suggested law was agreed to by Congress, not enough states agreed in time for it to become a law. a period of time in history that is known for a particular event, or for particular qualities era of (aera , from , , plural of aes ). Very long span of geologic time; in formal usage, a portion of geologic time of the second-greatest magnitude (eons are longer). Three eras are recognized: Paleozoic, Mesozoic, and Cenozoic. Because of the difficulties involved in establishing accurate chronologies, the Precambrian, or earliest, eras are classified independently. An era is composed of one or more geologic periods. Cenozoic Era Good Feelings Era of Licchavi era Malla era Mesozoic Era Paleozoic Era Palaeozoic Era Rana era
A division of geologic time next smaller than the eon and larger than a period Example: The Paleozoic era is in the Phanerozoic eon and includes, among others, the Devonian period
- An interval of geologic time shorter than an eon An era includes two or more periods There are four major eras: Precambrian, Paleozoic, Mesozoic, and Cenozoic
the average number of earned runs allowed by a pitcher in a game The ERA equals the pitcher's total number of earned runs divided by the total number of innings pitched, multiplied by the innings per game In softball ERA=ER/IP X 7