China
Africa
- Reference frames
- Reference genome
- Reference model
- Reference noise
- Reference plane
- Reference ranges
- Reference standards
- Referential integrity
- Referred pain
- Refinement
- Refineries
- Refinery
- Refining
- Reflectance
- Reflection
- Reflection coefficient
- Reflection seismology
- Reflection symmetry
- Reflections
- Reflective crack
- Reflective equilibrium
- Reflective surfaces
- Reflectometry
- Reflector
- Reflectron
- Reflex arcs
- Reflex klystron
- Reflexes
- Reflexive
- Reflexive relation
- Reflexive space
- Reflow soldering
- Reflux
- Reforestation
- Refraction
- Refractive index
- Refractive index detector
- Refractive index profile
- Refractive surgery
- Refractometer
- Refractory
- Refractory metals
- Refractory period
- Refresh
- Refresh rate
- Refreshable braille display
- Refrigerants
- Refrigeration
- Refrigeration cycle
- Refrigerator
- Refuges
- Refugia
- Refurbishment
- Refuse collection
- Regasification
- Regelation
- Regeneration
- Regenerative braking
- Regenerative cooling
- Regenerative design
- Regenerative fuel cell
- Regenerative heat exchanger
- Regenerative medicine
- Regenerator
- Regenerators
- Region growing
- Regional integration
- Regionalized variable theory
- Regioselectivity
- Registers
- Regolith
- Regression
- Regression analysis
- Regression dilution
- Regression to the mean
- Regression toward the mean
- Regression-kriging
- Regret
- Regula falsi
- Regular
- Regular dodecahedron
- Regular expressions
- Regular graph
- Regular grid
- Regular icosahedron
- Regular languages
- Regular measure
- Regular polygon
- Regular polyhedron
- Regular representation
- Regular semigroup
- Regular solution
- Regularization
- Regularized least squares
- Regulated function
- Regulated power supply
- Regulator gene
- Regulators
- Regulatory T cells
- Regulatory enzymes
- Regulons
- Regurgitation
- Rehabilitation
- Rehabilitation engineering
- Rehabilitation robotics
- Reidemeister moves
- Reification
- Reinforced carbon-carbon
- Reinforced concrete
- Reinforced concrete column
- Reinforced rubber
- Reinforcement
- Reinforcement learning
- Reinnervation
- Reinsurance
- Rejection sampling
- Rekeying
- Related-key attack
- Relation algebra
- Relational algebra
- Relational calculus
- Relational database
- Relational model
- Relational operators
- Relational space
- Relationship extraction
- Relative atomic mass
- Relative change
- Relative density
- Relative error
- Relative fluorescence units
- Relative frequency
- Relative intensity noise
- Relative likelihood
- Relative luminance
- Relative permeability
- Relative permittivity
- Relative risk
- Relative risk reduction
- Relative sea level
- Relative survival
- Relative velocity
- Relative wind
- Relatively compact
- Relativistic effects
- Relativistic electron beams
- Relativistic electrons
- Relativistic mass
- Relativistic plasma
- Relativistic wave equations