Browse the Concise Encyclopedia
- ren
- renaissance
- renaissance architecture
- renal cell carcinoma
- renal cyst
- renga
- rent
- reovirus
- reparations
- repertory theatre
- replacement deposit
- representation
- representation of the people acts
- representationalism
- repression
- reproduction
- reproductive behaviour
- reproductive system, human
- reptile
- republic
- republican party
- requiem mass
- resale price maintenance
- research and development (r&d)
- resin
- resistance
- resistivity
- resonance
- respiration
- respiratory distress syndrome
- respiratory system
- respiratory therapy
- restaurant
- restoration
- restoration literature
- restraint of trade
- restriction enzyme
- restrictive covenant
- retailing
- retaining wall
- reticuloendothelial system
- retina
- retriever
- retrograde motion
- retrovirus
- réunion
- reuters
- revelation
- revelation, book of
- revenue bond
- revenue sharing
- reverberatory furnace
- reverse transcriptase
- revillagigedo
- revivalism
- revolution
- revolutions of 1848
- revolver
- revue
- reye syndrome
- reynolds american inc.
- reynolds number
- rh blood-group system
- rhabdovirus
- rhaetian alps
- rhagae
- rhea
- rhesus monkey
- rhetoric
- rheumatic fever
- rheumatoid arthritis
- rhiannon
- rhineland
- rhinoceros
- rhinovirus
- rhizome
- rhode island school of design (risd)
- rhodes
- rhodes scholarship
- rhodes, colossus of
- rhodesia
- rhodesian ridgeback
- rhodian sea law
- rhodium
- rhodochrosite
- rhododendron
- rhodonite
- rhodope mountains
- rhodopsin
- rhubarb
- rhyme
- rhyolite
- rhythm and blues (r&b)
- rhythm and metre
- rhythmic sportive gymnastics
- ribalta, francisco
- ribera, josé de
- riboflavin
- ribose
- ribosome