| UD | United Dairies | 联合乳品公司 |
| UD | Underwater Demolition | 水下爆破 |
| UD | Uridine Diphosphate | 二磷酸尿核甙 |
| UD | University of Detroit | 底特律大学 |
| UD | Urethral Discharge | 尿道分泌物 |
| UD | University of Denver | 丹佛大学 |
| UD | Uniquely-Decodable | 唯一可解码 |
| UD | Unabsorbed Depreciation (accounting/finance) | Unabsorbed折旧(财务会计) |
| UD | Unit Diary | 单位日记 |
| UD | University of Dubuque (Iowa) | 杜克大学(爱荷华州) |
| UD | Undesirable Discharge | 勒令退役 |
| UD | Urban Dictionary (slang web site) | 城市词典(俚语网站) |
| UD | Unable to Approve Departure for the Time Specified | 无法在指定时间内批准离港 |
| UD | Unidoom (gaming clan) | Unidoom(游戏族) |
| UD | Under Digging (pipeline construction) | 挖掘中(管道施工) |
| UD | Undead (gaming) | 亡灵(游戏) |
| UD | Utilisation Declaration | 提款声明 |
| UD | United Devices | 联合设备公司 |
| UD | Utility Degree (AKC Obedience Degree) | 效用度(AKC服从度) |
| UD | ulnar deviation | 尺骨偏斜 |
| UD | Ut Dictum (Latin: As Directed) | Ut Dictum(拉丁语:按指示) |
| UD | Universitair Docent | 大学讲师 |
| UD | Usted (Spanish: Formal You) | Usted(西班牙语:正式的你) |
| UD | Underdark (roleplaying games, Dungeons & Dragons) | 幽暗地域(角色扮演游戏,地下城和龙) |
| UD | Utenriksdepartementet (Department of Foreign Affairs) | Utenriksdepartement(外交部) |
| UD | Udine (Friuli Venezia Giulia, Italy) | 乌迪内(意大利弗留利-威尼斯朱利亚) |
| UD | Ultra Digitizer | 超数字化仪 |
| UD | UniÓn de Derechas | UniÓn de Derechas |
| UD | Unit Defense | 单位防御 |
| UD | Use Definition | 使用定义 |
| UD | uroporphyrinogen decarboxylase | 尿卟啉原脱羧酶 |
| UD | Universal Design | 通用设计 |
| UD | Undisclosed | 未披露 |
| UD | User Domain | 用户域 |
| UD | United Diesel | 联合柴油机 |
| UD | Uniquely Decipherable | 唯一可解密 |
| UD | Urban Disease | 城市疾病 |
| UD | Unremove Directory (Norton Utilities) | 取消删除目录(Norton实用程序) |
| UD | United Defense | 联合国防部 |
| UD | Unofficially Dropped (grading system) | 非官方跌落(分级系统) |
| UD | University of Dayton (Dayton, OH) | 代顿大学(俄亥俄州代顿) |
| UD | Ultimate Disney (website) | 终极迪斯尼(网站) |
| UD | Under Defeat (game) | 战败(游戏) |
| UD | Utility Driver | 公用事业驱动程序 |
| UD | Ultimate Doom (game) | 终极末日(游戏) |
| UD | University of Dallas (Irving, TX, USA) | 达拉斯大学(美国德克萨斯州欧文) |
| UD | Ugly Duckling (band) | 丑小鸭(乐队) |
| UD | Universal Default | 通用默认值 |
| UD | Unit Designator | 单位代号 |
| UD | unit dose | 单位剂量 |
| UD | ulcer,duodenal | 十二指肠溃疡 |
| UD | dihydrouridylic acid | 二氢尿苷酸 |
| UD | urethral drainage | 尿道引流 |
| UD | urinary drainage | 尿路引流 |
| UD | uterine delivery | 子宫分娩 |
| UD | Up Down | 向上向下 |
| UD | UniÓn DemocrÁtica | UniÓn DemocrÁtica |
| UD | Udine (Provence) | 乌迪内(普罗旺斯) |
| UD | Untitled Document | 无标题文档 |
| UD | User Data | 用户数据 |
| UD | Usually Do | 通常这样做 |
| UD | Update Data | 更新数据 |
| UD | Unit Descriptor | 单位描述符 |
| UD | Under Developed | 开发不足 |
| UD | Universal Domain | 通用域 |
| UD | Uniformly Distributed | 均匀分布 |
| UD | Unrestricted Donation | 无限制捐赠 |
| UD | Uni Directional | 单向 |
| UD | Ultimate Destiny | 终极命运 |
| UD | Under Development | 正在开发中 |
| UD | Unlawful Detainer | 非法拘留者 |
| UD | Utility Dog | 多功能狗 |
| UD | Unidirectional | 单向 |
| UD | Under Duress | 在胁迫下 |
| UD | Underwater Diving | 水下潜水 |
| UD | Unitary District (UK) | 统一区(英国) |
| UD | Urban District | 市区 |
| UD | United Devices, Inc. | 联合设备公司。 |
| UD | UniÓn DemocrÁtica (Spanish: Democratic Union) | UniÓn DemocrÁtica (Spanish: Democratic Union) |
| UD | UltraDiagnostics (South Attleboro, MA) | UltraDiagnostics(马萨诸塞州南Attleboro) |
| UD | Upper Deck | 上层甲板 |
| UD | ulcerative dermatosis | 溃疡性皮肤病 |
| UD | User Defined | 用户定义的 |