Words · Familiar
epoch
/ˈɛpək/ · 5 letters · 5 distinct letters
- noun
a period marked by distinctive character or reckoned from a fixed point or event
- noun
(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded
- noun
a unit of geological time that is a subdivision of a period and is itself divided into ages