صفت ( adjective )• : تعریف: happening every two years or lasting two years; biennial.قید ( adverb )• : تعریف: every two years; biennially; biannually.
سالی دوبار (صفت)biannual, biyearlyسالی دوبار (قید)biyearlyدو سال یکبار (قید)biyearlyدو مرتبه در هر سال (قید)biyearly
• every two years, biennially; twice a year, semiannuallyoccurring every two years, biennial; occurring twice a year, semiannual