Lunation

лу́нный ме́сяц

lúnnyj mésjac

(a month measured from a lunar phase until the return of that same phase)

лу́нный ме́сяц

lúnnyj mésjac

(the name of term given the irregular period from one new moon until the next)

лунация

lunacija

(a month measured from a lunar phase until the return of that same phase)

лунация

lunacija

(the name of term given the irregular period from one new moon until the next)