The plural form of bimillennium; multiple two-thousand-year periods.
English plural of bimillennium, adding the standard -s ending rather than following the Latin -ia plural form, showing anglicization of the Latin term.
This word demonstrates how English adapts Latin terms by just adding '-s' instead of using the original Latin plural rules—we do this with 'curriculums' instead of 'curricula' too.
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