荻おぎ野の学がく説せつMeaningsNoun1. Ogino theory (basis of the rhythm method)Kanji used荻silvergrass野field学study説theoryPitch accentおぎのがくせつComposed of荻おぎAmur silvergrass (Miscanthus sacchariflorus)Noun野のfield; plain; hidden interior part (of a structure or object); wild (of an animal or plant)Noun学がく説せつtheoryNoun