An epoch is a period of time in history or a particular period in the development of something. The crossword solutions for the term epoch are DATE (4 letters), DAY (3 letters), DURATION (8 letters), GENERATION (10 letters), AEON (4 letters), AGE (3 letters), EON (3 letters), ERA (3 letters), and EOCENE (6 letters). DATE refers to a specific point in time, DAY is a 24-hour period, DURATION is the length of time something lasts, GENERATION is a group of people born and living around the same time, AEON is an indefinitely long period of time, AGE is a period of time in history, EON is an indefinitely long period of time, ERA is a period of time marked by a distinctive character, and EOCENE is a geological epoch that lasted from 56 to 33.9 million years ago.