| 熊成基 | Xióng Chéng jī | Xiong Chengji (1887-1910), anti-Qing revolutionary and martyr |
| 等位基因 | děng wèi jī yīn | allele (one of two paired gene in diploid organism) |
| 基辛格 | Jī xīn gé | Henry Kissinger (1923-), US academic and politician, Secretary of State 1973-1977 |
| 基坑 | jī kēng | foundation groove; trench for building foundation |
| 赫尔辛基 | Hè ěr xīn jī | Helsinki (Swedish Helsingfors), capital of Finland |
| 丁基 | dīng jī | butyl group (chemistry); Ding Ji (1917-1944), real name Li Baicen 李百岑, journalist based in Yanan, martyr of the revolution |
| 三硝基甲苯 | sān xiāo jī jiǎ běn | trinitrotoluene (TNT) |
| 世界自然基金会 | Shì jiè Zì rán Jī jīn huì | World Wildlife Fund WWF |
世界野生生物基金
会 | shì jiè yě shēng shēng wù jī jīn huì | World Wildlife Fund WWF |
| 丙基 | bǐng jī | propyl group (chemistry) |
| 乙基 | yǐ jī | ethyl group (chemistry) |
| 乙氨基 | yǐ ān jī | ethylamino group |
| 乙烯基 | yǐ xī jī | vinyl; vinyl group (chemistry) |
| 乙酸基 | yǐ suān jī | acetyl radical CH3COO- |
| 二甲基砷酸 | èr jiǎ jī shēn suān | dimethylarsenic acid (CH3)2AsO2H; cacodylic acid |
| 二甲基胂酸 | èr jiǎ jī shèn suān | dimethylarsenic acid (CH3)2AsO2H; cacodylic acid |
| 二硫基丙磺酸钠 | èr liú jī bǐng huáng suān nà | sodium dimercaptosulfanate |
| 二硫基丙醇 | èr liú jī bǐng chún | dimercaprol |
| 二硫基琥珀酸钠 | èr liú jī hǔ pò suān nà | sodium dimercaptosuccinate |
| 人民基本权利 | rén mín jī běn quán lì | fundamental civil rights |
| 人类基因组计划 | rén lèi jī yīn zǔ jì huà | Human Genome Project |
| 代数基本定理 | dài shù jī běn dìng lǐ | fundamental theorem of algebra |
| 代数学基本定理 | dài shù xué jī běn dìng lǐ | fundamental theorem of algebra (every polynomial has a complex root) |
| 依田纪基 | Yī tián Jì jī | Yoda Norimoto |
| 克基拉岛 | Kè jī lā dǎo | Corfu (Greek: Kerkira), island in the Ionian sea |
| 儿童基金会 | ér tóng jī jīn huì | UNICEF (United Nation's Children's fund) |
| 共同基金 | gòng tóng jī jīn | mutual fund |
| 利基 | lì jī | niche |
| 创投基金 | chuàng tóu jī jīn | venture capital fund |
| 刘基 | Liú Jī | Liu Ji or Liu Bowen 刘伯温 (1311-1375), general under the first Ming emperor Zu Yuanzhang 朱元璋, with a reputation as a military genius |
| 千碱基对 | qiān jiǎn jī duì | thousand base pair (kbp) |
| 卡内基 | Kǎ nèi jī | Carnegie (name); Andrew Carnegie (1835-1919), Scots American steel millionaire and philanthropist |
| 卡内基梅隆大学 | Kǎ nèi jī Méi lóng dà xué | Carnegie Mellon University, Pittsburgh |
| 反基督 | fǎn Jī dū | the anti-Christ |
| 四乙基铅中毒 | sì yǐ jī qiān zhōng dú | tetraethyl lead poisoning |
国家留学基金管理
委员会 | guó jiā liú xué jī jīn guǎn lǐ wěi yuán huì | China scholarship council CSC |
| 国际和平基金会 | guó jì hé píng jī jīn huì | international peace foundation |
| 国际货币基金 | Guó jì Huò bì Jī jīn | International Monetary Fund (IMF) |
| 国际货币基金组织 | guó jì huò bì jī jīn zǔ zhī | International Monetary Fund; IMF |
| 基加利 | Jī jiā lì | Kigali, capital of Rwanda |
| 基因修改 | jī yīn xiū gǎi | genetic modification |
| 基因图谱 | jī yīn tú pǔ | mapping of genome |
| 基因学 | jī yīn xué | genetics |
| 基因工程 | jī yīn gōng chéng | genetic engineering |
| 基因库 | jī yīn kù | gene bank |
| 基因技术 | jī yīn jì shù | genetic technology; biotechnology |
| 基因扩大 | jī yīn kuò dà | gene amplification |
| 基因改造 | jī yīn gǎi zào | genetic modification (GM) |
| 基因染色体异常 | jī yīn rǎn sè tǐ yì cháng | genetic chromosome abnormality |
| 基因治疗 | jī yīn zhì liáo | gene therapy |
