| 子 | zǐ | son; child; seed; egg; small thing; 1st earthly branch: 11 p.m.-1 a.m., midnight, 11th solar month (7th December to 5th January), year of the Rat; Viscount, fourth of five orders of nobility 五等爵位 |
| 子 | zi | (noun suffix) |
| 子女 | zǐ nǚ | children; sons and daughters |
| 子弹 | zǐ dàn | bullet; CL:粒,颗,发 |
| 子孙 | zǐ sūn | offspring; posterity |
| 子弟 | zǐ dì | child; the younger generation |
| 子粒 | zǐ lì | seed |
| 子房 | zǐ fáng | ovary |
| 子宫 | zǐ gōng | uterus; womb |
| 子叶 | zǐ yè | cotyledon (first embryonic leaf) |
| 子产 | Zǐ Chǎn | Zi Chan (?-522 BC), statesman and philosopher during the Spring and Autumn period |
| 子午线 | zǐ wǔ xiàn | meridian |
| 子时 | zǐ shí | 11 pm-1 am |
| 子代 | zǐ dài | offspring; child's generation |
| 子丑 | zǐ chǒu | first two of the twelve earthly branches 十二地支; by ext., the earthly branches |
| 子京 | zǐ jīng | see 紫荆 |
| 子公司 | zǐ gōng sī | subsidiary company; subsidiary corporation |
| 子囊菌 | zǐ náng jūn | ascomycete |
| 子域 | zǐ yù | subfield (math.) |
| 子夜 | zǐ yè | midnight |
| 子子孙孙 | zǐ zǐ sūn sūn | one's posterity |
| 子孝父慈 | zǐ xiào fù cí | see 父慈子孝 |
| 子孙娘娘 | Zǐ sūn Niáng niáng | Goddess of Fertility |
| 子宫内避孕器 | zǐ gōng nèi bì yùn qì | intrauterine device (IUD) |
| 子宫壁 | zǐ gōng bì | wall of the uterus |
| 子宫环 | zǐ gōng huán | intrauterine device (IUD) |
| 子宫肌瘤 | zǐ gōng jī liú | fibroid tumor of the uterus; hysteromyoma |
| 子宫颈 | zǐ gōng jǐng | cervix; neck of the uterus |
| 子宫颈癌 | zǐ gōng jǐng ái | cervical cancer |
| 子层 | zǐ céng | sublayer |
| 子弹火车 | zǐ dàn huǒ chē | bullet train; Shinkansen 新干线, Japanese high-speed train |
| 子曰 | zǐ yuē | Confucius says: |
| 子模型 | zǐ mó xíng | submodel |
| 子母弹 | zǐ mǔ dàn | (military) cluster bomb; shrapnel |
| 子母炮弹 | zǐ mǔ pào dàn | artillery cluster bomb |
| 子母炸弹 | zǐ mǔ zhà dàn | cluster bomb |
| 子民 | zǐ mín | people |
| 子洲 | Zǐ zhōu | Zishou county in Yúlín 榆林, Shǎnxī |
| 子洲县 | Zǐ zhōu xiàn | Zishou county in Yúlín 榆林, Shǎnxī |
| 子爵 | zǐ jué | viscount |
| 子癫前症 | zǐ diān qián zhèng | pre-eclampsia, toxaemia of pregnancy (medicine) |
| 子目 | zǐ mù | subheading; specific item |
| 子目录 | zǐ mù lù | subdirectory (computing) |
| 子程序 | zǐ chéng xù | subroutine |
| 子空间 | zǐ kōng jiān | subspace (math.) |
| 子系统 | zǐ xì tǒng | subsystem |
| 子细胞 | zǐ xì bāo | daughter cell |
| 子网 | zǐ wǎng | subnetwork |
| 子网屏蔽码 | zǐ wǎng píng bì mǎ | subnet mask (computing) |
| 子群 | zǐ qún | subgroup (math.) |
