分ぶん母ぼぶんぼCommon wordJLPTN1Freq.FrequencyTop 50,000Meanings1noundenominatormathematicsMathematical term for the bottom part of a fraction.分ぶん数すうの分ぶん母ぼがゼロになることはありません。The denominator of a fraction cannot be zero.分ぶん母ぼをそろえてから足たし算ざん