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Adjective: semiannual  `se-mee'a-nyoo-ul
  1. Occurring or payable twice each year
    "You must submit semiannual compliance reports"
    - biannual, biyearly, half-yearly

See also: periodic, periodical, semiannually

Encyclopedia: Semiannual

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sememe
semen
semester
semester hour
semestral
semestrial
semi
semi-
semiabstract
semi-abstraction
semiannual
semiannually
semiaquatic
semiarid
semiautobiographical
semiautomatic
semiautomatic firearm
semiautomatic pistol
semi-automatise
semi-automatize
semibreve