there isn't one. you could say something along the lines of "one revolution of the sun"
A century is another word for one hundred years
25 years in the past from today
10 years is a decade
half a decade
century
25 years in the past from today
A period of 1000 years is a millennium (plural millenia).
eg: during the past few years. my answer is in. eg: in the past few yeras
Adolescence
what is frolica design
ten years
Being elderly