| 三春 | sān chūn | the three spring months |
| 三昧 | sān mèi | Samadhi (Buddhist term) |
| 三更半夜 | sān gēng bàn yè | in the depth of the night; very late at night |
| 三曹 | Sān Cáo | the Three Caos (Cao Cao 曹操 and his sons Cao Pi 曹丕 and Cao Zhi 曹植), who established the Wei or Cao Wei dynasty 曹魏, and were all three noted poets and calligraphers |
| 三月 | sān yuè | March; third month (of the lunar year) |
| 三月份 | sān yuè fèn | March |
| 三朋四友 | sān péng sì yǒu | friends; cronies |
| 三框栏 | sān kuàng lán | name of radical in Chinese characters (Kangxi radical 22); see also 匚 |
| 三次 | sān cì | third; three times; (math.) degree three, cubic (equation) |
| 三次幂 | sān cì mì | cube (third power, math.) |
| 三次方 | sān cì fāng | cube (third power, math.) |
| 三次方程 | sān cì fāng chéng | cubic equation (math.) |
| 三次曲线 | sān cì qū xiàn | cubic curve (geometry) |
| 三归依 | sān guī yī | the Three Pillars of Faith (Buddha, dharma, sangha); see also 三宝 |
| 三段论 | sān duàn lùn | syllogism (deduction in logic) |
| 三毛猫 | sān máo māo | tortoiseshell cat; calico cat |
| 三民 | Sān mín | Sanmin district of Kaohsiung city 高雄市, south Taiwan |
| 三民区 | Sān mín qū | Sanmin district of Kaohsiung city 高雄市, south Taiwan |
| 三民乡 | Sān mín xiāng | Sanmin district of Kaohsiung city 高雄市, south Taiwan |
| 三氟化硼 | sān fú huà péng | boron trifluoride |
| 三氯化磷 | sān lǜ huà lín | phosphorous trichloride |
| 三氯化铁 | sān lǜ huà tiě | ferric chloride FeCl3 |
| 三氯已烯 | sān lǜ yǐ xī | trichloroethylene |
| 三氯已烷 | sān lǜ yǐ wán | trichloroethane |
| 三氯氧磷 | sān lǜ yǎng lín | phosphorous oxychloride |
| 三氯甲烷 | sān lǜ jiǎ wán | chloroform CHCl3; trichloromethane |
| 三水区 | Sān shuǐ qū | Sanshui district of Foshan city 佛山市, Guangdong |
| 三水县 | Sān shuǐ xiàn | Sanshui county in Guangdong |
| 三江并流 | Sān jiāng bìng liú | Three Parallel Rivers National Park, in mountainous northwest Yunnan World Heritage protected area: the three rivers are Nujian 怒江 or Salween, Jinsha 金沙江 or upper reaches of Changjiang and Lancang 澜沧江 or Mekong |
| 三江侗族自治县 | Sān jiāng dòng zú zì zhì xiàn | Sanjiang Dong autonomous county in Liuzhou 柳州, Guangxi |
| 三江平原 | Sān jiāng píng yuán | Sanjiang or Three rivers plain in Heilongjiang, vast wetland watered by Heilongjiang 黑龙江 or Amur, Songhua 松花江, Ussuri 乌苏里江 |
| 三江源 | Sān jiāng yuán | Sanjiangyuan National Nature Reserve, high plateau region of Qinghai containing the headwaters of Changjiang or Yangtze, Huanghe or Yellow River and Lancang or Mekong River |
| 三江生态旅游区 | Sān jiāng shēng tài lǚ yóu qū | Sanjiang ecological tourist area in Wenchuan county 汶川县, northwest Sichuan |
| 三河 | Sān hé | Three rivers; Sanhe county level city in Langfang 廊坊, Hebei |
| 三河市 | Sān hé shì | Sanhe county level city in Langfang 廊坊, Hebei |
| 三河县 | Sān hé xiàn | Sanhe county in Beijing |
| 三法司 | sān fǎ sī | Three judicial chief ministries in imperial China |
| 三洋 | sān yáng | Sanyō, Japanese electronics company |
| 三浦梅园 | Sān pǔ Méi yuán | MIURA Baien (1723-1789), Japanese neo-Confucian philosopher and pioneer economist, author of The Origin of value 价原 |
| 三温暖 | sān wēn nuǎn | sauna (Taiwan) |
| 三湾 | Sān wān | Sanwan township in Miaoli county 苗栗县, northwest Taiwan |
| 三湾乡 | Sān wān xiāng | Sanwan township in Miaoli county 苗栗县, northwest Taiwan |
| 三焦 | sān jiāo | triple foci, the three visceral cavities of traditional Chinese medicine |
| 三用表 | sān yòng biǎo | instrument console (diving) |
| 三田 | sān tián | 3 annual hunting bouts; 3 qi points; Mita, Sanda, Mitsuda etc (Japanese surname or place name) |
| 三略 | Sān Lüè | see "Three Strategies of Huang Shigong" 黄石公三略[Huang2 Shi2 gong1 San1 Lu:e4] |
| 三叠纪 | Sān dié jì | Triassic (geological period 250-205m years ago) |
| 三皇 | sān huáng | Three Sovereigns, between Gods and Emperors in third millennium BC; usually listed as Suiren 燧人, Fuxi 伏羲,trapping and writing, Shennong or Farmer God 神农 |
| 三皇五帝 | sān huáng wǔ dì | three sovereigns 三皇 and five emperors 五帝 of myth and legend; the earliest system of Chinese historiography |
| 三皇炮捶 | sān huáng pào chuí | Paochui - "Three Emperor Cannon Punch" (Chinese Martial Art) |
