| RFC | Request for Comments |
| RFID | Radio Frequency IDentification |
| RG Veda | RG Veda |
| RGB | RGB |
| Rhamnus alaternus | Rhamnus alaternus |
| Rhamphorhynchus | Rhamphorhynchus |
| Rhapsody in Blue | Rapsodia in blu |
| Rhapsody of Fire | Rhapsody of Fire |
| Rhea americana | Rheae |
| Rhea pennata | Pterocnemia pennata |
| Rheiformes | Rheae |
| Rhein-Erft-Kreis | Rhein-Erft-Kreis |
| Rhein-Kreis Neuss | Neuss |
| Rheineck | Rheineck |
| RheinEnergieStadion | RheinEnergieStadion |
| Rheingau | Rheingau |
| Rheingau-Taunus-Kreis | Rheingau-Taunus-Kreis |
| Rheinhessen | Rheinhessen |
| Rheinisch-Bergischer Kreis | Rheinisch-Bergischer Kreis |
| Rheinsberg | Reinsberg |
| Rheum rhabarbarum | Rheum |
| Rhincodon typus | Rhincodon typus |
| Rhino | Rhino |
| Rhinobatidae | Rhinobatidae |
| Rhinoceros sondaicus | Rhinoceros sondaicus |
| Rhinoceros unicornis | Rhinoceros unicornis |
| Rhinocerotidae | Rhinocerotidae |
| Rhipsalis | Rhipsalis |
| Rhizobium | Rhizobium |
| Rhizophoraceae | Rhizophorales |
| Rhizostomae | Rhizostomeae |
| Rho Cassiopeiae | Rho Cassiopeiae |
| Rhode Island | Rhode Island |
| Rhodesia | Rhodesia |
| Rhodesian Ridgeback | Rhodesian Ridgeback |
| Rhodophyta | Rhodophyta |
| Rhombozoa | Rhombozoa |
| Rhona Mitra | Rhona Mitra |
| Rhondda | Rhondda Cynon Taff |
| Rhus | Rhus coriaria |
| Rhus coriaria | Rhus coriaria |
| Rhynchocephalia | Sphenodon |
| Rhynchophorus ferrugineus | Rhynchophorus ferrugineus |
| Rhynchotus rufescens | Rhynchotus rufescens |
| Rhynochetidae | Rhynochetos jubatus |
| Rhythm and blues | Rhythm and blues |
| Rhythmophone | Rhythmophone |
| Rhäzüns | Rhäzüns |
| Ri | Lǐ |
| riachuelo | ruscello |
| Riad | Riyad |
| Rial qatarí | QAR |
| Rianjo | Rianxo |
| Riaz | Riaz |
| Riba de Santiuste | Santiuste |
| Ribarroja del Turia | Riba-roja de Túria |
| Ribas de Freser | Ribes de Freser |
| Ribe | Ribe |
| Ribeira | Ribeira |
| Ribeira Brava | Ribeira Brava |
| Ribeira Grande | Ribeira Grande |
| ribera | sponda |
| Ribera Alta | Ribera Alta |
| Ribera Baja | Ribera Baja |
| ribereño | litorale |
| Ribes nigrum | Ribes nigrum |
| ribete | bordura |
| ribetear | bordare |
| riboflavina | riboflavina |
| Ribointerferencia | RNA interference |
| ribonucleótido | ribonucleotide |
| ribosa | ribosio |
| ribosoma | ribosoma |
| ribosomal | ribosomiale |
| ribosómico | ribosomiale |
| Ribozima | Ribozima |
| ribulosa | ribulosio |
| Ric Flair | Ric Flair |
| ricamente | abbondante |
| Ricard Rubio | Ricky Rubio |
| Ricarda Huch | Ricarda Huch |
| Ricardo | Riccardo |
| Ricardo Bofill Levi | Ricardo Bofill |
| Ricardo Carvalho | Ricardo Carvalho |
| Ricardo Cromwell | Richard Cromwell |
| Ricardo de Clare | Riccardo di Clare |
| Ricardo de Cornualles | Riccardo di Cornovaglia |
| Ricardo Enrique Bochini | Ricardo Bochini |
| Ricardo Flores Magón | Ricardo Flores Magón |
| Ricardo III de Inglaterra | Riccardo III |
| Ricardo La Volpe | Ricardo Lavolpe |
| Ricardo Lagos Escobar | Ricardo Lagos |
| Ricardo Leoncio Elías Arias | Ricardo Leoncio Elías Arias |
| Ricardo María Carles Gordó | Ricardo María Carles Gordó |
| Ricardo Pereira | Riccardo |
| Ricardo Rodríguez de la Vega | Ricardo Rodríguez |
| Ricardo Rosset | Ricardo Rosset |
| Ricardo Zamora | Ricardo Zamora |
| Ricardo Zonta | Ricardo Zonta |
| Riccardo Cocciante | Riccardo Cocciante |
| Riccardo Giacconi | Riccardo Giacconi |
| Riccardo Muti | Riccardo Muti |
| Riccardo Paletti | Riccardo Paletti |
| Riccardo Patrese | Riccardo Patrese |
| Riccardo Ricco | Riccardo Riccò |
| Rich Internet Application | Rich Internet application |
| Rich Text Format | Rich text format |
| Richard | Riccardo |
| Richard Abegg | Richard Abegg |
| Richard Adams | Richard Adams |
| Richard Aldington | Richard Aldington |
| Richard Arkwright | Richard Arkwright |
| Richard Ashcroft | Richard Ashcroft |
| Richard Attenborough | Richard Attenborough |
| Richard August Carl Emil Erlenmeyer | Emil Erlenmeyer |
| Richard Avedon | Richard Avedon |
| Richard Axel | Richard Axel |
| Richard Bach | Richard Bach |
| Richard Branson | Richard Branson |
| Richard Brinsley Sheridan | Richard Brinsley Sheridan |
| Richard Buckminster Fuller | Richard Buckminster Fuller |
| Richard Burns | Richard Burns |
| Richard Burton | Richard Burton |
| Richard Chamberlain | Richard Chamberlain |
| Richard Dawkins | Richard Dawkins |
| Richard Dean Anderson | Richard Dean Anderson |
| Richard Donner | Richard Donner |
| Richard Dreyfuss | Richard Dreyfuss |
| Richard Edler von Mises | Richard von Mises |
| Richard Evelyn Byrd | Richard Evelyn Byrd |
| Richard Felton Outcault | Richard Felton Outcault |
| Richard Feynman | Richard Feynman |
| Richard Francis Burton | Richard Francis Burton |
| Richard Gasquet | Richard Gasquet |
| Richard Gere | Richard Gere |
| Richard Harris | Richard Harris |
| Richard Hell | Richard Hell |
| Richard Hughes | Richard Hughes |
| Richard Johnson | Richard Mentor Johnson |
| Richard Krajicek | Richard Krajicek |
| Richard Kuhn | Richard Kuhn |
| Richard Laymon | Richard Laymon |
| Richard Linklater | Richard Linklater |
| Richard Matheson | Richard Matheson |
| Richard Meier | Richard Meier |
| Richard Nathaniel Wright | Richard Wright |
| Richard Nikolaus Graf von Coudenhove-Kalergi | Richard Nikolaus di Coudenhove-Kalergi |
| Richard Nixon | Richard Nixon |
| Richard Owen | Richard Owen |
| Richard Parkes Bonington | Richard Parker Bonington |
| Richard Rogers | Richard Rogers |
| Richard Rorty | Richard Rorty |
| Richard Réti | Richard Réti |
| Richard Smalley | Richard Smalley |
| Richard Sorge | Richard Sorge |
| Richard Stallman | Richard Stallman |
| Richard Steele | Richard Steele |
| Richard Stone | Richard Stone |
| Richard Strauss | Richard Strauss |
| Richard Tolman | Richard Tolman |
| Richard Trevithick | Richard Trevithick |
| Richard von Krafft-Ebing | Richard von Krafft-Ebing |
| Richard Wagner | Richard Wagner |
| Richard Willstätter | Richard Martin Willstatter |
| Richard Wright | Richard Wright |
| Richard Zsigmondy | Richard Adolf Zsigmondy |
| Richie Sambora | Richie Sambora |
| Richmond | Richmond |
| Ricimero | Ricimero |
| ricino | ricina |
| Ricinus communis | Ricinus communis |
| ricitos de oro | riccioli d'oro |
| Rick Astley | Rick Astley |
| Rick Rubin | Rick Rubin |
| Rick Wakeman | Rick Wakeman |
| Rick Wright | Rick Wright |
| Rickenbacker | Rickenbacker |
| Rickettsia | Rickettsia |
| rickshaw | risciò |
| Ricky Martin | Ricky Martin |
| Ricky Nelson | Ricky Nelson |
| Ricky Ullman | Ricky Ullman |
| rico | delizioso |
