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English - English (Wordnet) dictionary (also found in English - Vietnamese, Computing (FOLDOC))
era
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Noun
  • (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
  • a major division of geological time; an era is usually divided into two or more periods
  • a period marked by distinctive character or reckoned from a fixed point or event
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