eon
noun (North American English or specialist)(British English usually aeon)
- (formal)
an extremely long period of time; thousands of years 极漫长的时间；千万年 Only yesterday—and it seemed eons ago, not just a few hours—he had been a happily married man. 昨天他还是个婚姻美满的人，但那好像是上辈子的事了，而不是才过去几小时。
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geology 地质学 a major division of time, divided into eras 宙（地质学上的年代分期，下分代） eons of geological history 数以亿万年计的地质史