| 正电子 | zhēng diàn zi | positron (antiparticle of the electron) |
| 正路 | zhèng lù | the right way |
| 正色 | zhèng sè | stern; grim; resolute; firm; unflinching; fundamental colors |
| 正巧 | zhèng qiǎo | just by chance; to happen to (just at the right time); opportune |
| 正门 | zhèng mén | the formal entrance, main gate (to a university etc); portal |
| 正丁醚 | zhèng dīng mí | butyl ether |
| 正中要害 | zhèng zhōng yào hài | to hit the nail on the head (idiom) |
| 正五边形 | zhèng wǔ biān xíng | regular pentagon |
| 正交群 | zhèng jiāo qún | orthogonal group (math.) |
| 正人君子 | zhèng rén jūn zi | upright gentleman; man of honor |
| 正仓院 | Zhēng cāng yuàn | Shōsō-in, treasure house belonging to Tōdai-ji 東大寺, Nara 奈良, Japan, an extensive repository of imperial treasures from Tang times; described as the east-most end of the Silk road |
| 正值 | zhèng zhí | just at the time of; honest; upright; (math.) positive value |
| 正传 | zhèng zhuàn | main subject of long novel; true biography |
| 正六边形 | zhèng liù biān xíng | regular hexagon |
| 正则 | zhèng zé | regular (figure in geometry) |
| 正则参数 | zhèng zé cān shù | regular parametrization |
| 正化 | zhèng huà | normalization; to normalize |
| 正半轴 | zhèng bàn zhóu | positive semi-axis (in coordinate geometry) |
| 正反两面 | zhèng fǎn liǎng miàn | two-way; reversible; both sides of the coin |
| 正史 | zhèng shǐ | the 24 or 25 official dynastic histories; true history, as opposed to fictional adaptation or popular legends |
| 正向前看 | zhèng xiàng qián kàn | look-ahead assertion |
| 正品 | zhèng pǐn | certified goods; quality product; normal product; A-class goods |
| 正多胞形 | zhèng duō bāo xíng | convex polytope |
| 正大光明 | zhèng dà guāng míng | just and honorable |
| 正太 | zhèng tài | young, cute boy; derived from Japanese loanword shotacon 正太控 |
| 正太控 | zhèng tài kòng | shotacon (Japanese loanword); manga or anime genre depicting young boys in an erotic manner |
| 正妹 | zhèng mèi | beautiful woman; sexy woman |
| 正子 | zhèng zǐ | positron; also called 正电子 |
| 正字法模式 | zhèng zì fǎ mó shì | orthographic pattern |
| 正字法空间 | zhèng zì fǎ kōng jiān | orthographic space |
| 正字法规则 | zhèng zì fǎ guī zé | orthographic rule |
| 正字法阶段 | zhèng zì fǎ jiē duàn | orthographic stage |
| 正安 | Zhēng Ān | Zheng'an county in Zun'yi 遵义, Guizhou |
| 正安县 | Zhēng Ān xiàn | Zheng'an county in Zun'yi 遵义, Guizhou |
| 正宗 | zhèng zōng | orthodox school; fig. traditional; old school; authentic; genuine |
| 正定县 | Zhèng dìng xiàn | Zhengding county in Shijiazhuang 石家庄, Hebei |
| 正室 | zhèng shì | first wife; legal wife |
| 正宫娘娘 | Zhēng gōng Niáng niáng | Empress; senior Imperial Consort; Queen Mother |
| 正宁 | Zhèng níng | Zhengning county in Qingyang 庆阳, Gansu |
| 正宁县 | Zhèng níng xiàn | Zhengning county in Qingyang 庆阳, Gansu |
| 正对 | zhèng duì | directly facing |
| 正常值 | zhèng cháng zhí | regular value; the norm |
| 正常化 | zhèng cháng huà | normalization (of diplomatic relations etc) |
| 正常工作 | zhèng cháng gōng zuò | normal operation; proper functioning |
| 正常成本 | zhèng cháng chéng běn | normal cost (accountancy) |
| 正式投票 | zhèng shì tóu piào | formal vote |
| 正弦形 | zhèng xián xíng | sinusoidal (shaped like a sine wave) |
| 正房 | zhèng fáng | central building (in a traditional house); first wife |
| 正教 | zhèng jiào | lit. true religion; orthodox religion; orthodox Christianity; Islam (in the writing of Chinese or Hui theologians) |
| 正教真诠 | zhèng jiào zhēn quán | Exegesis of true religion by Wang Daiyu 王岱舆, a study of Islam; also translated as Real hermeneutics of orthodox religion |
