epoch
英 ['i?p?k; 'ep?k]
美['?p?k]
- n. [地質] 世；新紀元；新時代；時間上的一點
英英釋意
- 1. a period marked by distinctive character or reckoned from a fixed point or event
- 2. (astronomy) the precise date that is the point of reference for which information (as coordinates of a celestial body) is referred
- 3. a unit of geological time