不定积分 Traditional 不定積分 bù dìng jī fēn 🔊 indefinite integral (math.) + Keep this word Meanings bù dìng jī fēn 不定積分 indefinite integral (math.) Its characters 不bùnot; noHSK 1定dìngto fix; to set; to make definiteHSK 4积jīto amass; to accumulate; to store upHSK 7–9分fēnminute (past the hour)HSK 1