Plural of biweekly; publications or events that occur every two weeks or twice per week.
From 'bi-' (two) + 'weekly,' creating an ambiguous term that can mean either 'every two weeks' or 'twice weekly,' a confusion that persists in English because of competing etymologies.
The word 'biweeklies' is genuinely confusing—a biweekly magazine might publish 26 times per year (twice weekly) or 26 times per year (every two weeks), which are the same by coincidence but arose from different meanings of 'bi-'!
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