| ray | rayo |
| Ray Allen | Ray Allen |
| Ray Bradbury | Ray Bradbury |
| Ray Charles | Ray Charles |
| Ray Evans | Ray Evans |
| Ray Hnatyshyn | Ramon John Hnatyshyn |
| Ray Lankester | Ray Lankester |
| Ray Liotta | Ray Liotta |
| Ray Manzarek | Ray Manzarek |
| Ray Romano | Ray Romano |
| Ray Tomlinson | Ray Tomlinson |
| Ray Toro | Ray Toro |
| Ray Ventura | Ray Ventura |
| Raygun | Blaster |
| Rayleigh | Rayl |
| Rayleigh criterion | Criterio de Rayleigh |
| Rayleigh distribution | Distribución de Rayleigh |
| Rayleigh limit | Límite de Rayleigh |
| Rayleigh number | Número de Rayleigh |
| Rayleigh scattering | Dispersión de Rayleigh |
| Rayleigh-scattering | Dispersión de Rayleigh |
| Rayleigh-Taylor instability | Inestabilidad Rayleigh-Taylor |
| Rayman | Rayman |
| Rayman Raving Rabbids | Rayman Raving Rabbids |
| Rayman series | Rayman |
| Raymond Aron | Raymond Aron |
| Raymond Barre | Raymond Barre |
| Raymond Carver | Raymond Carver |
| Raymond Chandler | Raymond Chandler |
| Raymond Dart | Raymond Dart |
| Raymond Franz | Creencias y prácticas de los Testigos de Jehová |
| Raymond III of Tripoli | Raimundo III de Trípoli |
| Raymond IV of Toulouse | Raimundo IV de Tolosa |
| Raymond IV of Tripoli | Raimundo IV de Tolosa |
| Raymond Kopa | Raymond Kopa |
| Raymond Kurzweil | Raymond Kurzweil |
| Raymond Loewy | Raymond Loewy |
| Raymond Nonnatus | Ramón Nonato |
| Raymond of Aguilers | Raimundo de Aguilers |
| Raymond of Antioch | Raimundo de Poitiers |
| Raymond of Burgundy | Raimundo de Borgoña |
| Raymond of Peñafort | Raimundo de Peñafort |
| Raymond Poincaré | Raymond Poincaré |
| Raymond Pons of Toulouse | Raimundo III de Trípoli |
| Raymond Queneau | Raymond Queneau |
| Raymond Roger Trencavel | Raymond Roger Trencavel |
| Raymond Roussel | Raymond Roussel |
| Raymond V of Toulouse | Ramón V de Tolosa |
| Raymond VI of Toulouse | Ramón VI de Tolosa |
| Raymond VII of Toulouse | Ramón VII de Tolosa |
| Raymond-Roger de Trencavel | Raymond Roger Trencavel |
| Raymound Roussel | Raymond Roussel |
| Raynald of Chatillon | Reinaldo de Châtillon |
| Rayo Vallecano | Rayo Vallecano |
| rayon | rayón |
| Raysko Praskalo | Raysko Praskalo |
| raze | eliminar |
| Raziel | Raziel |
| Razin effect | Efecto Razin |
| razor | afeitadora |
| razor blade | hoja de afeitar |
| Razor-billed Curassow | Mitu tuberosa |
| razor-sharp | muy afilado |
| Razor-shell | Cuchillo |
| razorbill | alca |
| Razorlight | Razorlight |
| razz | alzar |
| Razès | Rasez |
| Raël | Rael |
| Raëlism | Movimiento raeliano |
| Raï | Raï |
| Raúl Alarcón | Raúl Alarcón |
| Raúl Alcalá | Raúl Alcalá |
| Raúl Alfonsín | Raúl Alfonsín |
| Raúl Baduel | Raúl Isaías Baduel |
| Raúl Bravo | Raúl Bravo Sanfélix |
| Raúl Castro | Raúl Castro |
| Raúl Francisco Primatesta | Raúl Primatesta |
| Raúl García | Raúl García Escudero |
| Raúl González | Raúl González |
| Raúl Juliá | Raúl Juliá |
| Raúl Prebisch | Raúl Prebisch |
| Raúl Salinas de Gortari | Raúl Salinas de Gortari |
| Raúl Sanguineti | Raúl Sanguineti |
| Raúl Solnado | Raul Solnado |
| Raül López | Raúl López Molist |
| Raška | Rascia |
| Rb | Rubidio |
| RBMK | RBMK |
| RC | RC |
| RC circuit | Circuit RC |
| RC Lens | Racing Club de Lens |
| RC oscillator | Oscilador electrónico |
| RC Strasbourg | Racing Club de Strasbourg |
| RCA | Radio Corporation of America |
| RCA connector | Conector RCA |
| RCB star | Estrella RCB |
| RCD Espanyol | Real Club Deportivo Español |
| RCD Espanyol B | Real Club Deportivo Espanyol B |
| RCD Mallorca | Real Club Deportivo Mallorca |
| RCMA star | Estrella RCMA |
| RCP | Rcp |
| RDBMS | Sistema de administración de |
| RDF Schema | RDF Schema |
| RDF Site Summary | RSS |
| RDRAM | RIMM |
| RDX | RDX |
| re | con referencia a |
| re-create | recrear |
| re-do | rehacer |
| re-education | reeducación |
| re-entrant | entrante |
