era 
/ˈerə, Brit ˈɪərə/ noun
plural eras /ˈerə, Brit ˈɪərə/ noun [count] : a period of time that is associated with a particular quality, event, person, etc.
▪ the Victorian era ▪ the Christian era ▪ the era of the horse and buggy ▪ We're just now entering an era of great prosperity. ▪ His death marks the end of an era. — compare epoch
▪ the Victorian era ▪ the Christian era ▪ the era of the horse and buggy ▪ We're just now entering an era of great prosperity. ▪ His death marks the end of an era. — compare epoch
