| 序号 | 英文 | 音标 | 词性 | 中文 |
| | racemize | `rAsImaIz, reI`si:- | v. | [化] 外消旋 |
| | racemoid | 5reis7mCid | adj.；n. | adj. 外消旋的；n. 外消旋物 |
| | racemomucor | rAsi5mCmjukE | | 总状毛霉 |
| | racemomycin | 7rAsEmE5maisin | | 穗霉素 |
| | racemose | `rAsImEus, reI`si:- | adj. | 总状花序的, 葡萄状的 |
| | racemose cyme | | | 聚伞圆锥花序 |
| | racemule | 5rAsi7mju:l | n. | 小串状花, 小总状花序 |
| | racemulose | rA5semjulEus | adj. | 小串状花序的, 串状排列的 |
| | racer | 5reisE | n. | 比赛者(包括人,动物,车辆等),<美>[动]游蛇属 |
| | racerunner | 5reisrQnE | n. | [动] 鞭尾蜥(产于南美和北美) |
| | racetrack | 5reistrAk | n. | (主要用于赛马, 赛狗的)跑道 |
| | racetrack torus | | | 跑道环 |
| | raceway | 5reiswei | n. | 水沟, (赛车用的)跑道 |
| | raceway for wiring | | | 电线管路 |
| | raceway grinder | | | 轴承[环]滚道磨床 |
| | raceway grinding machine | | | 轴承(环)滚道磨床 |
| | rachel | 5reItFl | adj. | & n.(化妆品的)浅黄褐色(的) |
| | rachet | 5rAtFit | | (防倒转的)棘齿 |
| | rachialgia | 7reiki5AldViE | | 脊柱痛 |
| | rachianesthesia | 7reiki7Anes5Wi:ziE | | [医]脊髓麻醉(法) |
| | rachides | `rAkIdi:z, `reI- | n. | (rachis的复数) 花轴, 叶轴 |
| | rachiform | 5reikEfC:m | adj. | [植] 花轴状的, 叶轴形的 |
| | rachigraph | 5reikigrB:f | | 脊柱描记器 |
| | rachilla | rE5kilE | n. | [植] 小穗轴, 小花轴 |
| | rachimorphous | 7reiki5mC:fEs | | 穗轴状的 |
| | rachiodont | `reIkIEudCnt, `rA- | adj. | (蛇)具喉齿的,具脊齿的 |
| | rachion | 5reikiEn | | 防波线 |
| | rachis | 5reikis | n. | 叶轴, 花轴 |
| | rachischisis | rE5kiskEsis | | 先天性椎弓不连 |
| | rachitic | rE5kitik | adj. | 佝偻病的 |
| | rachitis | rE5kaitis | n. | 佝偻病, 脊柱炎 |
| | rachitomous vertebra | | | 棘状椎 |
| | rachlet | 5rAklEt | | 侧轴 |
| | racial | 5reiFEl | adj. | 人种的, 种族的, 种族间的 |
| | racial diversity | | | 种族参差[差异]性 |
| | racial immunity | | | 种族免疫 |
| | racial inheritance | | | 种族遗传 |
| | racial memory | | | [心理]种族记忆 |
| | racialism | 5reIFElIz(E)m | n. | 种族主义, 人种偏见, 种族歧视 |
| | racialist | `reIFElIst | n. | 种族主义者 |
| | racially | | adv. | 按人种, 人种上 |
| | racily | 5reisili | adv. | 保持原味地, 津津有味地, 爽快地, 生动地 |
| | racinage | 9rAsI`nB:V | n. | 酸显法(用酸使革上装饰花样显现出来) |
| | raciness | 5reisinis | n. | 生动活泼 |
| | racing | 5reisiN | vi.；n.；adj. | vi. 竞赛, 赛马, 赛车, 赛艇；n. 竞赛；adj. 比赛的 |
| | racing bar | | | 矫正磨轮用凿 |
| | racing bat | | | 赛马鞭子 |
| | racing bicycle | | n. | 赛车, 竞赛用自行车 |
| | racing boat | | | 赛艇 |
| | racing car | | n. | 赛车 |
| | racing cutter | | | 赛艇 |
| | racing cycle | | n. | 公路赛车 |
| | racing declaration | | | 竞赛声明 |
| | racing dive | | | 出发跳水, 比赛出发 |
| | racing driver | | | 赛车驾驶员 |
| | racing engine | | | 赛车用发动机 |
| | racing flag | | | 竞赛旗 |
| | racing form | | n. | 赛马新闻, 赛马消息报 |
| | racing gallop | | | 竞赛跑步 |
| | racing handlebars | | | 赛车车把 |
| | racing lane | | | 比赛泳道 |
| | racing number | | | 赛跑运动员号码 |
| | racing saddle | | | 赛车车座 |
| | racing shorts | | | 自行车运动员短裤 |
| | racing stable | | n. | 赛马饲养训练场 |
| | racing strip | | | 赛马跑道 |
| | racing stroke | | | 快频率动作 |
| | racing trim | | | 帆船装备及人员 |
| | racing-car | | n. | 赛车，跑车 |
| | racism | 5reisizEm | n. | 种族主义, 人种偏见, 种族歧视 |
| | racist | 5reisist | n. | 种族主义者 |
| | racist education | | | 种族教育 |
| | rack | rAk | n.；vt.；vi. | n. 架, 行李架, 拷问台, 小步跑, 烧酒, 破坏；vt. 放在架上, 在架上制作, 折磨, 加以拷问, 使痛苦, 榨取；vi. 在饲草架装满干草, 变形, (云)随风飘, (马)小步跑 |
| | rack and pinion adjustment | | | 粗调装置(齿轮齿条调整装置) |
| | rack and pinion gearing | | | 齿条小齿轮传动装置 |
| | rack and pinion mechanism | | | 齿条-齿轮传动机构 |
| | rack arm support | | | 齿条臂座 |
| | rack back | | | 训斥,申斥 |
| | rack banking stop | | | 齿条止挡 |
| | rack banking stop tube | | | 齿条止挡套 |
| | rack bar | | | 齿条, 齿杆 |
| | rack barrel | | | 齿杆套 |
| | rack car | | | [美]有板架设备可载运汽车的铁路货车 |
| | rack catch | | | (卧铺)衣物袋止挡 |
| | rack circle | | | 平面锥齿轮 |
| | rack construction | | | 机架［架式］结构 |
| | rack control shaft | | | 齿条控制轴 |
| | rack cutter | | | 齿条刀(具), 齿条铣刀 |
| | rack cutting | | | 齿条[排刀]切削 |
| | rack cutting attachment | | | 齿条切削附件 |
| | rack cutting machine | | | 齿条切削机, 切齿条机 |
| | rack driving planing machine | | | 齿条传动刨床 |
| | rack earth | | | 机壳地线, 机架接地 |
| | rack feed | | | 齿条进给 |
| | rack fixed stake | | | 线路固定标桩 |
| | rack gear | | | 齿条(传动) |
| | rack hook | | | (钟的)齿条钩 |
| | rack housing | | | 齿条罩 |
| | rack jobber | | | 超级市场批发商 |
| | rack lever escapement | | | 齿条杠杆擒纵机构 |
| | rack lever spring | | | 齿条杆式擒纵机构弹簧 |