| HEM | Hemp | 大麻 |
| HEM | Hemoglobin | 血红蛋白 |
| HEM | hematology | 血液学 |
| HEM | Human Exposure Modeling | 人体暴露建模 |
| HEM | Heavy Equipment Maintenance | 重型设备维护 |
| HEM | hemolytic | 溶血的 |
| HEM | hemolysis | 溶血 |
| HEM | Heat Exchange Method | 热交换方法 |
| HEM | Historical Electronics Museum (Museum of electronics including radar, military, and microwave devices; Linthicum, Maryla | 历史电子博物馆（包括雷达、军事和微波设备在内的电子博物馆；马里兰州林奇库姆 |
| HEM | Healthcare Environmental Manager | 医疗环境经理 |
| HEM | Historic Engineering Marker (Australia) | 历史工程标志（澳大利亚） |
| HEM | Human Eradication Mode (TV show South Park) | 人类根除模式（电视节目《南方公园》） |
| HEM | Home Education Magazine | 家庭教育杂志 |
| HEM | High Energy Magic (Discworld) | 高能魔术（Discworld） |
| HEM | Human Epidermal Model | 人类表皮模型 |
| HEM | Hollywood Entertainment Museum | 好莱坞娱乐博物馆 |
| HEM | Historical Electronics Museum | 历史电子博物馆 |
| HEM | n-hexane-extractable material | 正己烷可萃取材料 |
| HEM | Hydrogenic Effective Mass | 氢有效质量 |