1. (noun) era, epoch
a period marked by distinctive character or reckoned from a fixed point or event
Synonyms: earned run average, date of reference, geological era, era, epoch
2. (noun) era, geological era
a major division of geological time; an era is usually divided into two or more periods
Synonyms: earned run average, geological era, era, epoch
3. (noun) earned run average, ERA
(baseball) a measure of a pitcher's effectiveness; calculated as the average number of earned runs allowed by the pitcher for every nine innings pitched
Synonyms: geological era, epoch, earned run average
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