biyearly

Adverb
  1. Every two years (synset 400280480)
    "this festival takes places biennially"
    same as: biennially
  2. Twice a year (synset 400256795)
    same as: semiannually
Adjective
  1. Occurring every second year (synset 301976542)
    "they met at biennial conventions"
    similar to: periodic, periodical - happening or recurring at regular intervals
    same as: biennial
  2. Occurring or payable twice each year (synset 301976413)
    similar to: periodic, periodical - happening or recurring at regular intervals
    same as: biannual, half-yearly, semiannual

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