संस्‍कृतशब्‍दकोशः

Monier–Williams

अर्धमास — {māsá} m. half a month VS. AV. &c##({ardhamāsa}) {-tama} mfn. done or happening every half month or fortnight Pāṇ. 5-2, 57##{-śás} ind. every half month ŚBr##{-sahasra} n. a thousand of half months ŚBr