| r ... Racer |
| racerunner ... radial-arm saw |
| radian ... Radio Television Malaysia |
| Radio Uganda ... Raegnald I |
| Raemaekers, Louis ... railroad |
| Railroad Convention ... Rajasiha, Kittisiri |
| Rajasinha I ... ram truck |
| ram's horns ... Ramm, Mount |
| rammed earth ... Rand Daily Mail |
| Rand McNally & Company ... Rankin, Nell |
| Rankine cycle ... ras oncogene |
| Ras Tanura ... ratfish |
| Rath na Riogh ... Ravidas |
| Ravikiran Mandal ... Razi, ar- |
| Razin, Stenka ... real answer |
| real bills doctrine ... receptor potential |
| receptor-effector coupling ... Recto, Claro Mayo |
| rectocele ... red mulberry |
| Red Nacional de los Ferrocarriles Espanoles ... red-wattled lapwing |
| red-winged blackbird ... reed |
| reed ... reflex sympathetic dystrophy |
| reflex-like activity ... Reger, Max |
| reggae ... Regulus, Marcus Atilius |
| regur ... Reiner, Carl |
| Reiner, Fritz ... relay nucleus |
| relay race ... Remenyi, Eduard |
| Remer, Otto Ernst Fritz Adolf ... Rene, France-Albert |
| Renee of France ... replacement |
| replacement cost ... required freight rate |
| rer ... Resistencia |
| resistivity ... Restore Hope, Operation |
| restoring force ... retrograde motion |
| retronuevo ... reverse transcription |
| reverse-biased junction ... Reymond, Pierre |
| Reymont, Wladyslaw Stanislaw ... rhetoriqueur |
| Rhetra ... rhododendron |
| rhodolite ... Ribas, Oscar |
| ribat ... Rich, Buddy |
| Rich, Charlie ... Richler, Mordecai |
| Richmond ... Ridgway, Matthew Bunker |
| Ridi Vihara ... right hemisphere |
| Right Media ... rime riche |
| rime suffisante ... Rio de la Plata, Viceroyalty of the |
| Rio de Oro ... Ristoro d'Arezzo |
| rita ... Riviere, Jacques |
| Riviere, Osborne ... Robert de Torote |
| Robert F. Kennedy Bridge ... Robinson, A. N. R. |
| Robinson, Abraham ... Roches, Leon |
| Rochester ... rocket and missile system |
| rocket assistance ... Rodrigues, Amalia da Piedade Rebordao |
| Rodrigues, Nelson ... Rohilla |
| Rohilla War ... Rolling Stones, the |
| rolling strike ... Romanov Dynasty |
| Romanov, Grigory Vasilyevich ... Rong River |
| Rong Yiren ... ropy bread |
| roque ... Rosedale |
| Rosedale ... Ross, Steve |
| Ross, Wilbur ... rotational molding |
| rotational motor ... Rouche, Jacques |
| Rouelle, Hilaire-Marin ... Rovigo, Francesco Xanto Avelli di |
| roving ... Royal Commission on Trade Unions and Employers' Associations |
| Royal Copenhagen porcelain ... Royall, Anne Newport |
| Royall, William ... Ruby, Jack |
| ruby-crowned kinglet ... rufous-tailed jacamar |
| Rufus, Rutilius ... Rumsfeld, Donald |
| Rumtek ... Rush, Benjamin |
| Rush, Geoffrey ... Russo, Patricia F. |
| Russo-Finnish War ... RV Tauri star |
| Rwagasore ... |
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