era
(noun)
noun
1. a period marked by distinctive character or reckoned from a fixed point or event
Similar word(s): epoch
Definition categories: time, period
2. a major division of geological time; an era is usually divided into two or more periods
Definition categories: time
3. (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
Definition categories: communication, criterion, measure, standard, touchstone