Meaning : (astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded.
Synonyms : date of reference
Meaning : A unit of geological time that is a subdivision of a period and is itself divided into ages.
Epoch ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Epoch ka matlab kya hota hai?