| R | Ring/Ringspun | 环锭纺 |
| R | Resistance,Resistor | 电阻,电阻器 |
| R | r | 惊奇 |
| R | Regina | 女王时的代号 |
| R | Runner (Mic-O-Say, Heart of America Council, Boy Scouts of America) | 跑男(Mic-O-Say,美国心脏理事会,美国童子军) |
| R | US Revenue Stamp (Scott Catalogue prefix; philately) | 美国印花税(斯科特目录前缀;集邮) |
| R | Third Heartbeat Wave | 第三次心跳波 |
| R | Radial (ply tire) | 子午线轮胎 |
| R | Recibo (Portugese) | 朗诵(葡萄牙语) |
| R | Roentgen (unit of radiation exposure) | 伦琴(辐射暴露单位) |
| R | Rebound (basketball) | 反弹(篮球) |
| R | Arginine (amino acid) | 精氨酸(氨基酸) |
| R | Relevant (polygraphy) | 相关(测谎) |
| R | Received (logging abbreviation) | 接收(日志缩写) |
| R | Manitoba (postal code designation, Canada) | 马尼托巴省(邮政编码名称,加拿大) |
| R | Rua (Portuguese: street; postal usage) | Rua(葡萄牙语:街道;邮政使用) |
| R | Russian (rabbit breed) | 俄语(兔子品种) |
| R | Set of Real Numbers (math) | 实数集(数学) |
| R | US DoT tire speed rating (106 mph) | 美国DoT轮胎额定速度(106英里\/小时) |
| R | Radar Contact (aviation) | 雷达联系(航空) |
| R | Romeo (aviation letter code) | 罗密欧(航空字母代码) |
| R | Rankine (Degree) | 兰金(学位) |
| R | South African Rand (national currency) | 南非兰特(本国货币) |
| R | Ramp Time (wireless communication) | 斜坡时间(无线通信) |
| R | Racing (car version) | 赛车(汽车版) |
| R | Are | 是 |
| R | Rare | 稀有的 |
| R | receptor | 感受器 |
| R | radiologist | 放射科医生 |
| R | roentgenologist | 放射学家 |
| R | respiratory exchange ratio | 呼吸交换比 |
| R | rectal | 直肠的,直肠的 |
| R | rhizobium | 根瘤菌属 |
| R | roentgenology | 射线照相学 |
| R | radiology | 放射学 |
| R | reticulocyte | 网织红细胞 |
| R | Radiancy | 辐射度 |
| R | Rabbi | 拉比 |
| R | Rimmed | 镶边的 |
| R | Repeatability | 可重复性 |
| R | rinne's test | 林尼(氏)(音叉)试验阴性 |
| R | Roughness | 粗糙度 |
| R | roentgen unit | 伦琴单位 |
| R | Confidential - Restricted Data (TMINS) | 机密-受限数据(TMINS) |
| R | Routine (logging abbreviation) | 常规(测井缩写) |
| R | Reprint | 重印 |
| R | rhipicephalus | 鼻裂畸形 |
| R | Reinforcing | 钢筋 |
| R | Reflectance | 反射率 |
| R | Reliability | 可靠性 |
| R | Registered Trademark (usually written ®) | 注册商标(通常用®) |
| R | Republican | 共和国的 |
| R | Reverse (automatic transmissions) | 倒档(自动变速器) |
| R | Restricted Audiences - under 17 years of age not permitted without parent/guardian (movie rating) | 限制——在观众17岁的父母或监护人不得而(电影等级) |
| R | treatment | 治疗 |
| R | roentgen | 伦琴 |
| R | Risk Assessment | 风险评估 |
| R | Rain (weather reports) | 雨(天气报告) |
| R | Restricted | 受限制的 |
| R | Ring | 戒指 |
| R | Radial | 径向的 |
| R | real number | 实数 |
| R | Respirations | 呼吸 |
| R | Routine | 常规 |
| R | rough | 粗糙的 |
| R | resistance factor | 阻力系数 |
| R | recovery | 恢复 |
| R | rectum | 直肠 |
| R | behnken's unit | 本肯(氏)单位(x线) |
| R | radiography | 射线照相术 |
| R | Research Octane | 研究辛烷值 |
| R | recessive | 隐性的 |
| R | residue | 残留 |
| R | reaction | 反应 |
| R | radioactive | 放射性的 |
| R | ribose | 核糖 |
| R | Reuters | 路透社 |