epoch /ēˈpok, ēˈpohh or epˈok/ or (archaic) epocha /-ə/

1. A point of time fixed or made remarkable by some great event from which dates are reckoned
2. The particular time, used as a point of reference, at which the data had the values in question (astronomy)
3. A planet's heliocentric longitude at the epoch (astronomy)
4. A precise date
5. A time from which a new state of things dates
6. An age (geological, historical, etc)

epochal /epˈok-l/ adjective

epˈoch-māking adjective

Important enough to be considered as beginning a new age

epˈoch-marking adjective

epoch of osculation noun (astronomy) see osculating orbit under osculant

• etherified
• etherifies
• etherify
• etherifying
• etherion
• etherions
• etherisation
• etherisations
• etherise
• etherised
• etherises
• etherising
• etherism
• etherisms
• etherist
• etherists
• etherization
• etherizations
• etherize
• etherized
• etherizes
• etherizing
• Ethernet
• etheromania
• etheromaniac