Millennia
/mɪˈlɛn.i.ə/noun
Plural of millennium: periods of one thousand years.
Did you know?The word ultimately comes from Latin *mille* (“thousand”), the same ancient root behind English words like *mile* and *millefleur*, showing how one number can echo through time and language.
Etymological Timeline
Proto-Indo-European
PIE
*sm̥h₁-l̥- / *mél-
“A prehistoric numeral root for “thousand” that later fed Latin *mille* and related forms.”
Latin
Latin
mille
““A thousand.””
Latin
Latin
mīllēnnium
“A period of a thousand years.”
Middle English
English
millenium / millennium
“A thousand-year period, especially in religious or historical contexts.”
Modern English
English
millennia
“Plural of millennium, meaning multiple thousand-year periods.”