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Adjective biyearly has 2 senses
- biennial, biyearly - occurring every second year; "they met at biennial conventions"
- semiannual, biannual, biyearly - occurring or payable twice each year
Adverbial biyearly has 2 senses
- biennially, biyearly - every two years; "this festival takes places biennially"
- semiannually, biyearly - twice a year
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