Plural of bimonthly; publications or events that occur every two months, or occurring twice in one month.
Plural form of bimonthly, from bi- (two) + monthly (every month). The term has evolved since the 19th century with some ambiguity about whether it means 'twice a month' or 'every two months.'
Bimonthly is one of English's most confusing words—it can mean both 'every two months' AND 'twice a month,' which has caused countless magazine subscription mix-ups!
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