- r ... Rabbit Is Rich
- rabbit pox ... Rachel
- Rachel bat Joshua ... Radcliffe, Daniel
- Radcliffe, Daniel Jacob ... radiative forcing
- radiative nuclear encounter ... Radio Shack
- radio source ... Radley, Arthur
- Radley, Boo ... rag worm
- rag, the ... Rahr Plains
- Rahula ... Rainallucci, Pietro
- rainband ... Raising of Lazarus, The
- Raising of the Cross, The ... Rajnikant
- Rajnikanth ... Raluana language
- ram ... Ramatirtha
- Ramatirthan, L. S. ... Ramirez, Manuel Aristides
- Ramírez, Martín ... Ramsar Convention
- Ramsauer-Townsend effect ... Rand
- rand ... range straggling
- range zone ... Ranulf Higdon
- Ranunculaceae ... rapids
- Rapier ... Rashbaz
- Rashdall, Hastings ... Rasul v. Bush
- Rasulid dynasty ... rational choice institutionalism
- rational choice theory ... Räuberbande, Die
- Rauch, Christian Daniel ... rāwī
- rawinsonde ... Raymond, Don
- Raymond, Eric ... RDA
- RDC clause ... Reader’s Scope
- reader’s theatre ... Real-Encyklopädie für protestantische Theologie und Kirche
- real-time echocardiography ... Rebecque, Henri-Benjamin Constant de
- Rebel Angels, The ... recht van den sterkste, Het
- rechtbanken ... reconciliation
- reconciliation ... rectum
- rectus abdominis muscle ... red cedar
- red clay ... red lead
- red lechwe ... Red Sky in the Morning
- red slender loris ... red-shouldered hawk
- red-tailed black shark ... Redmayne, Edward John David
- Redmond ... reed frog
- reed instrument ... Reeves, Steve
- Reeves, Steven ... Reform Club
- Reform Judaism ... Regan, Tom
- Regar ... Regional Assistance Mission to Solomon Islands
- regional climatology ... Regular Division of the Plane
- regular flower ... Reichenbachfälle
- Reichenberg ... Reiner Gamma
- Reiner, Carl ... rejuvenation
- Reka Kama ... reliablism
- reliance ... religious rule
- Religious Science ... Remi
- Remi de Reims, Saint ... renal osteodystrophy
- renal papilla ... Renison Bell
- Renjian cihua ... repeater
- repeater jamming ... repression
- repression ... Republican Party
- Republican Party ... Rescue 8
- Rescue and Return of Astronauts and the Return of Objects Launched into Space, Agreement on the ... residential architecture
- residential hotel ... resonance photo-ionization
- resonance structure ... Restauradores, Praça dos
- restaurant ... Retamar, Roberto Fernández
- retardation factor ... retrognathia
- retrograde amnesia ... Reuters
- Reutersvard, Oscar ... reverse lend-lease
- reverse osmosis ... Revolutionary Left
- Revolutionary Party ... Reynolds, Burt
- Reynolds, Burton Leon ... Rhakotis
- Rhamnaceae ... Rhetoric of Fiction, The
- rhetorical question ... Rhins, The
- Rhipicephalus sanguineus ... Rhodinocichla rosea
- rhodinol ... rhyme
- rhyme royal ... rib vault
- rib weave ... Ricci, Ruggiero
- Ricci, Scipione de’ ... Richard Coeur de Lion
- Richard Cory ... Richardson, Samuel
- Richardson, Sir John ... ricinium
- ricinoleic acid ... Ride This Night!
- Ride with the Devil ... Rif
- Rif ... Right Opposition
- right resolve ... Rijksuniversiteit te Leiden
- Rijmbijbel ... Rimmon
- Rîmnicu Vîlcea ... ringhals
- ringing ... Río Guainía
- Río Guaviare ... Ripa, Matteo
- Riparia riparia ... Risin’ with the Blues
- Rising ... Ritter reaction
- Ritter vom Geiste, Die ... River, The
- River, The ... Riza Paşa, Ali
- Riza Shah Pahlevi ... Road to Lichfield, The
- Road to Life: or, Epic of Education, The ... Robbins, Peter
- Robbins, Thomas Eugene ... Roberti, Ercole de’
- Roberto Carlos canta para a juventude ... Robespierre, Maximilien
- Robespierre, Maximilien-François-Marie-Isidore de ... Robinson, Richard Jean-Louis
- Robinson, Robert ... Roche, Martin
- Roche, Mazo de la ... rock gunnel
- Rock Hill ... Rockefeller family
- Rockefeller Foundation ... Rocky Mountain bristlecone pine
- Rocky Mountain College ... Rodnina, Irina Konstantinovna
- Rodó, José Enrique ... Roger & Me
- Roger Ebert on the future of the feature film ... Röhm affair
- Röhm, Ernst ... Rolie, Gregg
- Rolin, Dominique ... Roma
- Roma ... Román y Reyes, Víctor Manuel
- Roman, Johan Helmich ... Romantic movement
- Romantic Religion ... Romero, Pedro
- Romerolagus diazi ... Ronia, the Robber′s Daughter
- rōnin ... Roosevelt, Edith
- Roosevelt, Eleanor ... Rory O’Conor
- ROS ... Rose in Bloom
- rose leafhopper ... Rosenbach Fellowship in Bibliography
- Rosenbach Foundation ... Roskosmos
- Roslin Institute ... Rossiiskaya Akademiya Nauk
- Rossija ... rotary polarization
- rotary press ... ROTHR
- Rothschild Egg ... Rouget de Lisle, Claude-Joseph
- Rough and Ready Lot, The ... Rous sarcoma virus
- Rous, Elizabeth Leslie ... Rowlands, Gena
- Rowlands, John ... Royal Border Bridge
- Royal Botanic Garden ... Royal Military Academy
- Royal Mint ... royalty
- Royaume de Belgique ... Ru River
- Ru yao ... rubisco
- Rubivirus ... rudite
- Rūdkhāneh-ye Harīrūd ... rufous-throated dipper
- Rufst du, mein Vaterland ... rukh
- Rukh ... Rumelihisarı
- rumen ... Runeberg, Johan Ludvig
- Runge, Friedlieb Ferdinand ... Ruprecht, Prinz
- Ruprecht-Karl-Universität Heidelberg ... Rüsselbecher
- Russell ... Russian duck
- Russian Empire ... Rustico di Filippo
- Rusticus ... rutuburi
- Rutul language ... Rybačij Peninsula
- Rybakov, Anatoly ... Rzhev