不ふ定てい積せき分ぶんMeaningsNoun1. indefinite integralKanji used不negative定define積pile up and accumulate分partPitch accentふていせきぶんComposed of不ふ定ていunsettled; uncertain; indefinite; unfixed; variable; irregular; changeable; indeterminateNo-adjective積せき分ぶんintegration; integralNoun