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Era
01
a period of history marked by particular features or events
Example
The discovery of penicillin marked the start of a new era in medical treatment and antibiotics.
The fall of the Berlin Wall marked the beginning of a new era in European politics.
02
(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
03
(geology) a subdivision of time that divides eon into smaller units
Example
The discovery of penicillin marked the start of a new era in medical treatment and antibiotics.
The fall of the Berlin Wall marked the beginning of a new era in European politics.
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