EpochWordNet Explorer

the time of the physical formation and development of the earth (especially prior to human history)

a unit of geological time during which a system of rocks formed

a period marked by distinctive character or reckoned from a fixed point or event

an amount of time

an era of existence or influence

an era of history having some distinctive feature

the present or recent times

(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded