| 1 | 乙 | 乙 | yǐ | yi3 | second of the ten Heavenly Stems 十天干 ); ethyl; bent; winding; radical in Chinese characters (Kangxi radical 5); ancient Chinese compass point: 105° | | |
| 2 | 乙醇 | 乙醇 | yǐ chún | yi3 chun2 | ethanol C2H5OH; same as alcohol 酒精 | | |
| 3 | 乙烯 | 乙烯 | yǐ xī | yi3 xi1 | ethylene; vinyl | | |
| 4 | 乙炔 | 乙炔 | yǐ quē | yi3 que1 | acetylene; ethyne C2H2 | | |
| 5 | 乙酸 | 乙酸 | yǐ suān | yi3 suan1 | acetic acid (CH3COOH); ethanoic acid | | |
| 6 | 帝乙 | 帝乙 | dì yǐ | Di4 Yi3 | Di Yi (died 1076 BC), Shang dynasty king, reigned 1101-1076 BC | | |
| 7 | 聚氯乙烯 | 聚氯乙烯 | jù lǜ yǐ xī | ju4 lu:4 yi3 xi1 | polyvinyl chloride (PVC) | | |
| 8 | 氧乙炔焊炬 | 氧乙炔焊炬 | yǎng yǐ quē hàn jù | yang3 yi3 que1 han4 ju4 | oxyacetylene torch | | |
| 9 | 氧乙炔焊 | 氧乙炔焊 | yǎng yǐ quē hàn | yang3 yi3 que1 han4 | oxyacetylene welding | | |
| 10 | 氧乙炔 | 氧乙炔 | yǎng yǐ quē | yang3 yi3 que1 | oxyacetylene | | |
| 11 | 太乙金华宗旨 | 太乙金華宗旨 | tài yǐ jīn huá zōng zhǐ | Tai4 yi3 Jin1 hua2 Zong1 zhi3 | The Secret of the Golden Flower, a classic of Chinese Taoism published in the late 17th century | | |
| 12 | 四乙基铅中毒 | 四乙基鉛中毒 | sì yǐ jī qiān zhōng dú | si4 yi3 ji1 qian1 zhong1 du2 | tetraethyl lead poisoning | | |
| 13 | 四氯乙烯 | 四氯乙烯 | sì lǜ yǐ xī | si4 lu:4 yi3 xi1 | tetrachloroethylene | | |
| 14 | 氯乙烯 | 氯乙烯 | lǜ yǐ xī | lu:4 yi3 xi1 | vinyl chloride C2H3Cl; chloroethylene | | |
| 15 | 聚乙烯 | 聚乙烯 | jù yǐ xī | ju4 yi3 xi1 | polythene; polyethylene | | |
| 16 | 聚四氟乙烯 | 聚四氟乙烯 | jù sì fú yǐ xī | ju4 si4 fu2 yi3 xi1 | polytetrafluoroethylene (PTFE), trademarked as Teflon | | |
| 17 | 聚苯乙烯 | 聚苯乙烯 | jù běn yǐ xī | ju4 ben3 yi3 xi1 | polystyrene | | |
| 18 | 甲之蜜糖,乙之砒霜 | 甲之蜜糖,乙之砒霜 | jiǎ zhī mì táng , yǐ zhī pī shuāng | jia3 zhi1 mi4 tang2 , yi3 zhi1 pi1 shuang1 | one man's meat is another man's poison (idiom) | | |
| 19 | 甲乙 | 甲乙 | jiǎ yǐ | jia3 yi3 | first two of the ten Heavenly Stems 十天干 | | |
| 20 | 合四乙尺工 | 合四乙尺工 | hé sì yǐ chě gōng | he2 si4 yi3 che3 gong1 | names of the five notes of the Chinese pentatonic scale, corresponding roughly to do, re, mi, sol, la | | |
| 21 | 二氯乙烷中毒 | 二氯乙烷中毒 | èr lǜ yǐ wán zhōng dú | er4 lu:4 yi3 wan2 zhong1 du2 | dichloroethane poisoning | | |
| 22 | 乙状结肠 | 乙狀結腸 | yǐ zhuàng jié cháng | yi3 zhuang4 jie2 chang2 | sigmoid colon (anatomy); bent colon, linking the descending colon to the rectum | | |
| 23 | 对乙酰氨基酚 | 對乙酰氨基酚 | duì yǐ xiān ān jī fēn | dui4 yi3 xian1 an1 ji1 fen1 | paracetamol; acetaminophen | | |
| 24 | 待乙妥 | 待乙妥 | dài yǐ tuǒ | dai4 yi3 tuo3 | DEET (insect repellent) (loanword) | | |
| 25 | 醋酸乙酯 | 醋酸乙酯 | cù suān yǐ zhǐ | cu4 suan1 yi3 zhi3 | ethyl acetate; acetidin | | |