| RA | Royal Academy of Arts | (英国)皇家艺术院 |
| RA | Research Association | 研究协会 |
| RA | Radium | 镭(化学元素) |
| RA | research assistants | 助研 |
| RA | Retinoic acid | 维甲酸 |
| RA | Red Armor | 红盔 |
| RA | rear axle | (汽车)后桥 |
| RA | Rheumatoid arthritis | 类风湿性关节炎 |
| RA | dangerous goods surcharge | 危险品处理费,承运人收取此费为RAC,代理人收取此费为RAA |
| RA | Royal Academician | (英国)皇家艺术院会员 |
| RA | Royal Artillery | (英国)皇家炮兵 |
| RA | Rubber Age | 《橡胶时代》 |
| RA | Rubber Abstracts | 《橡胶文摘》 |
| RA | Royal Academy | 皇家学院 |
| RA | Right Ascension | 赤经 |
| RA | Repeat to Address | 地址重复 |
| RA | Reliability Analysis | 可靠性分析 |
| RA | Register Allocator | 寄存器分配器 |
| RA | Read Amplifier | 读放大器 |
| RA | Range-Azimuth | 距离方向校正器 |
| RA | Random Access | 随机存取 |
| RA | Radar Altimeter | 雷达测高仪 |
| RA | Renal Artery | 肾动脉 |
| RA | Racing | 竟速 |
| RA | Regional Association | 区域协会 |
| RA | Radiology Assembly of Medical Group Management Association | 医疗集团管理协会放射学大会 |
| RA | Regular Army | 正规军 |
| RA | Registration Authority | 登记机关 |
| RA | Resident Assistant | 驻地助理 |
| RA | Regulatory Affairs | 监管事务 |
| RA | Radiological Assessment | 放射性评估 |
| RA | Reimbursement Authorization | 报销授权书 |
| RA | Rapid Access | 快速访问 |
| RA | radionuclide angiography | 放射性核素血管造影术 |
| RA | Rainforest Alliance | 雨林联盟 |
| RA | radius | 半径 |
| RA | Royal Ambassadors | 皇家大使 |
| RA | Resident Advisor | 常驻顾问 |
| RA | Room Air | 室内空气 |
| RA | Republic of Armenia | 亚美尼亚共和国 |
| RA | Return Authorization | 退货授权 |
| RA | Research Associate | 研究助理 |
| RA | Radio Altimeter | 无线电高度表 |
| RA | relative binding affinity | 相对结合亲和力 |
| RA | rheumatoid agglutinins | 类风湿凝集素 |
| RA | Rankine | 兰金牌手表 |
| RA | Realm Ability (Dark Age of Camelot on-line game) | 境界能力(Camelot在线游戏的黑暗时代) |
| RA | Rapport | 亲善 |
| RA | Research Assistant/ship | 研究助理/船舶 |
| RA | Remote Assistance | 远程协助 |
| RA | Router Arbiter | 路由器仲裁器 |
| RA | Reserve Affairs | 储备事务 |
| RA | Regia Aeronautica (Italian Royal Air Force) | Regia Aeronautica(意大利皇家空军) |
| RA | Republic Act (Philippines) | 共和国法(菲律宾) |
| RA | Recruit Alliance | 招募联盟 |
| RA | Ration Allowance | 口粮津贴 |
| RA | Red Armageddon (gaming clan) | 红色末日(游戏部落) |
| RA | Regulatory Authority | 监管机构 |
| RA | Right Ascension (astronomy) | 右升天(天文学) |
| RA | Reinforced Alert | 强化警报 |
| RA | Requirements Analysis | 需求分析 |
| RA | Red Army (counterstrike gaming clan) | 红军(反击游戏部落) |
| RA | Reduction in Area | 面积的减少 |
| RA | Recovery Assistance (Program; Ohio) | 恢复援助(计划;俄亥俄州) |
| RA | Responsible Authorities | 负责当局 |
| RA | Research Announcement | 研究公告 |
| RA | Regular Appointment | 定期约会 |
| RA | Ready Access | 就绪访问 |
| RA | Remittance Advice | 汇款通知 |
| RA | Rebel Alliance (Star Wars) | 反叛联盟(星球大战) |
| RA | Regulatory Analysis (environment) | 监管分析(环境) |
| RA | Reasonable Alternative | 合理的替代方案 |
| RA | Resident Administrator | 常驻管理员 |
| RA | Record Auditing | 记录审核 |
| RA | Resource Allocation | 资源分配 |
| RA | Red Alert | 红色警报 |
| RA | Routing Arbiter | 路由仲裁员 |
| RA | Radio Australia | 澳大利亚电台 |
| RA | radioactivity | 放射性 |
| RA | Regional Anesthesia | 区域麻醉 |
| RA | Registered Architect | 注册建筑师 |
| RA | Remote Access | 远程访问 |
| RA | Rear Area | 后部区域 |
| RA | Ripple Adder | 波纹加法器 |
| RA | Resident Agent | 常驻代理人 |
| RA | Remedial Action | 补救措施 |
| RA | Risk Analysis | 风险分析 |
| RA | Restricted Article | 受限物品 |
| RA | Reconnaissance Aircraft | 侦察机 |
| RA | Resident Auditor | 驻地审计员 |
| RA | Remote Adapter | 远程适配器 |
| RA | Random Allocation | 随机分配 |
| RA | Rate Adaptation | 速率自适应 |
| RA | Rental Agreement | 租赁协议 |
| RA | Research Article | 研究文章 |
| RA | Robot Aircraft | 机器人飞机 |