I. adverb Date: 1829 twice a month, II. adjective Date: 1829 occurring twice a month, III. noun Date: 1843 a ~ publication
SEMIMONTHLY
Meaning of SEMIMONTHLY in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012