- R ... Rabbit Is Rich
- rabbit pox ... Rachel
- Rachel bat Joshua ... Radcliffe, Ann
- Radcliffe, Daniel ... radiative capture
- radiative forcing ... radio sensor
- radio serial ... Radke, Lina
- Radke-Batschauer, Karoline ... Raft, The
- rafter ... Rahman, Hasim
- Rahman, Hosain ... rain splash
- rain-fed agriculture ... raisin
- Raisin in the Sun, A ... Rajmahal
- Rajnandgaon ... Ralph of Coggeshall
- Ralph Rashleigh: or, The Life of an Exile ... Ramanujacharya
- Ramanujan, Srinivasa ... rāmī al-jamarāt
- ramie ... Ramphele, Mamphela Aletta
- ramphotheca ... ranchera
- ranchería ... Rangda
- range ... Ransom, Basil
- Ransom, John Crowe ... Raphidiodea
- Raphidioptera ... rasa
- Rasarnava ... Rassemblement National
- Rassemblement National et Démocratique ... Rathouisiidae
- Ratibida ... Rattus hoogerwerfi
- Rattus lugens ... Raw
- RAW ... Rayleigh scattering
- Rayleigh wave ... RCA Electronic Music Synthesizer
- RCA in Music City, U.S.A.: The Nashville Sound ... reactor
- reactor core ... Real McCoys, The
- real number ... reasonable-use doctrine
- Reasonableness of Christianity, The ... receptor
- receptor ... recoil nucleus
- recoil proton ... Recruiting Officer
- recruiting reflex ... red bed
- Red Beds ... red hartebeest
- Red Harvest ... Red River Settlement
- Red River to Appomattox ... red-billed quelea
- red-billed weaver ... redfish
- Redford, Charles Robert, Jr. ... reductive elimination
- reductive pentose phosphate cycle ... reef stonefish
- reefer ... Reflections on the Painting and Sculpture of the Greeks
- Reflections on the Revolution in France ... refractor
- refractory ... Reghin
- Regia ... Regnault de Saint Jean d’Angély, Michel-Louis-Étienne, Comte
- Regnault, Henri-Victor ... rehearsal
- rehearsal ... Reidy, Affonso Eduardo
- Reifezeugnis ... Reise um die Welt
- Reisebilder ... relative polycythemia
- relative price effect ... Religion in Geschichte und Gegenwart
- Religion in the Making ... remanence
- remanence ... Remove the Stain Act
- RemoveDEBRIS ... rendang
- Rendell, Ruth ... Rent
- rent ... Report from Part One
- Report from Part Two ... Repubblica Sociale Italiana
- Repubblica, La ... Répudiation, La
- Repulse ... Resedaceae
- resemblance nominalism ... Resistance Against Japanese Aggression, War of
- resistance dimmer ... respiratory alkalosis
- respiratory care ... Restormel
- Restormel Castle ... reticulin
- reticulocyte ... Return of the Dragon
- Return of the Jedi ... Revell, Viljo
- Révellière-Lépeaux, Louis-Marie de La ... review
- Review ... revolving-beam lighthouse
- revolving-cup electric anemometer ... Reza, Yasmina
- Rezanov, Nikolay Petrovich ... rhapsoidoi
- rhapsoidos ... Rhind papyrus
- Rhine Falls ... rhizome
- rhizomorph ... Rhododendron prostratum
- Rhododendron protistum variety giganteum ... Rhynchophthirina
- rhynchophthirinan ... ribbon machine
- ribbon microphone ... rice paper
- rice polish ... Richard IV, duke of Normandy
- Richard Jewell ... Richelieu River
- Richelieu, Armand-Emmanuel du Plessis, duc de ... Ricker, Maëlle
- Rickert, Heinrich ... Riders, The
- ridge ... Rifāʿīyah
- Rifbjerg, Klaus ... right view
- right whale ... Riker, William Harrison
- Rikers Island ... Rinaldo
- Rinaldo ... Ringmaster’s Daughter, The
- Ringo, John ... Rio Lobo
- Rio Madeira ... ripgut grass
- Riphean sequence ... Rising Village, The
- Rising, The ... Ritter, John
- Ritter, Jonathon Southworth ... Rivera y Barrientos Acosta y Rodríguez, Diego María Concepción Juan Nepomuceno Estanislao de la
- Rivera, Chita ... Rizal, José
- Rizalist cult ... Road to Morocco
- Road to Perdition ... Robbins, Tim
- Robbins, Timothy Francis ... Roberti, Ercole de’
- Roberto Carlos canta para a juventude ... Robeson Channel
- Robeson, Paul ... Robinson, Randall
- Robinson, Raphael M. ... Roche, Édouard
- Roche, Frances Ruth Burke ... rock fumewort
- rock garden ... rockberry
- Rockdale: The Growth of an American Village in the Early Industrial Revolution ... Rocky Horror Picture Show, The
- Rocky II ... Rodna Mountains
- Rodney of Stoke-Rodney, George Brydges Rodney, 1st Baron ... Roessler, Ernestine
- Roethke, Theodore ... Rohde, David S.
- Rohde, Erwin ... Role Models
- Role of Defensive Pursuit, The ... Rolong
- roloway monkey ... Roman Republic
- Roman Republic ... Romanos III Argyros
- Romanos IV Diogenes ... Rømer, Ole Christensen
- Romer, Paul ... Rondelet, Guillaume
- rondelle ... Rooneyia
- Roop, Isaac ... roquet
- roquette ... Rose Bowl Parade
- rose cactus ... rosella
- rosella ... Roshan Akhtar
- Roshana ... Rossen, Robert
- Rossendale ... rot gut
- Rota ... Rothaar Hills
- Rothaargebirge ... Rou
- Rou ... round-leaved wintergreen
- round-off error ... roving
- Rovno ... Roy, Suzanna Arundhati
- Royal Academy of Arts ... royal governor
- Royal Greenwich Observatory ... Royal Swedish Ballet
- Royal Tapestry Factory of Santa Bárbara ... RSI
- Ṛṣi-pañcamī ... Rubia cordifolia
- Rubia peregrina ... Rudawlī
- Rudbeck, Olof ... Rueil, Peace of
- Rueil-Malmaison ... Ruhr
- Ruhr occupation ... Ruling Class, The
- ruling engine ... run-and-jump defense
- Run-D.M.C. ... Rupa-Rupa
- rūpadhātu ... Rush, Benjamin
- Rush, Bobby ... Russell, William Felton
- Russell, William Hepburn ... Russo, Patricia
- Russo, Patricia Fiorello ... Rutherford, Mark
- Rutherford, Michael ... Rwanda, Republika y’u
- Rwandaise, République ... Ryōan Temple
- Ryōan-ji ... Rzhev
