noun a period marked by distinctive character or reckoned from a fixed point or event
Synonymsepoch
noun a major division of geological time; an era is usually divided into two or more periods
Synonymsgeological era
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
Synonymsearned run average
Source: WordNet 3.1, Princeton University
