子部 zǐbù philosophy division Origin Definitions Defs Strokes Stroke Words Sentences Sents zǐbù philosophy division 子 zǐ Philosophers the third category of the traditional Chinese four-division library system, consisting of philosophical or technical works部 bù noun category (bound form) category; class; genus; used in terms like 部首 bùshǒuzǐbù Radical 39 子 zǐ noun son (bound form) son; child; offspring部 bù noun category (bound form) category; class; genus; used in terms like 部首 bùshǒu