Relating to or lasting for a period of two months.
From Latin 'bi-' meaning two and 'mensis' meaning month, with the adjective suffix '-ial.' This is the adjectival form of bimester used in formal contexts.
English loves having multiple ways to say the same thing—'bimestrial,' 'bimonthly,' and 'bimensal' all try to describe the same time span, which is why language constantly confuses itself.
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