epoch
UK: ˈiːpɒk | US: ˈepək
n. a particular period of time in history or a person's life, typically marked by notable events or characteristics
n. (Geology) a division of time that is a subdivision of a period and is itself subdivided into ages
n. (Astronomy) an arbitrarily fixed date relative to which planetary or stellar measurements are expressed
The word "epoch" traces back to the Greek epochē, meaning "pause" or "fixed point," derived from epechein ("to hold upon"). It entered English via Latin epocha and French époque, originally referring to a fixed point in time (e.g., in astronomy). Over time, it expanded to denote significant periods marked by defining events, reflecting its root idea of a "hold" or anchor in the timeline.
The Renaissance was an epoch of cultural rebirth in Europe.
Scientists use the Jurassic epoch to study dinosaur evolution.
The invention of the internet marked a new epoch in communication.
Her graduation ceremony felt like the end of an epoch in her life.
Astronomers calculated the planet's position relative to the current epoch.