- Renin
- Renin angiotensin aldosterone system
- Renin inhibitors
- Renin receptor
- Renin-angiotensin system
- Rennet
- Renovascular hypertension
- Renpenning syndrome
- Renpenning's syndrome
- Renshaw cells
- Renzapride
- Reovirus
- Repaglinide
- Repeatable Battery for the Assessment of Neuropsychological Status
- Repeated implantation failure
- Repeated measures design
- Reperfusion
- Reperfusion injury
- Reperfusion therapy
- Repetition priming
- Repetitive DNA
- Repetitive nerve stimulation
- Repinotan
- Replantation
- Replication
- Replication factor C
- Replication factor c
- Replication protein A
- Replisome
- Repolarization
- Reporter gene
- Repotrectinib
- Representational Difference Analysis
- Representational systems
- Repressed memory
- Repression
- Repressor proteins
- Repressors
- Reproductive fitness
- Reproductive health
- Reproductive immunology
- Reproductive isolation
- Reproductive justice
- Reproductive loss
- Reproductive medicine
- Reproductive organ
- Reproductive rights
- Reproductive success
- Reproductive surgery
- Reproductive system
- Reproductive technology
- Reproductive toxicity
- Reprogramming
- Reptation
- Reptilase time
- Reputation management
- Resampling
- Resazurin
- Rescue breathing
- Research Diagnostic Criteria
- Research Domain Criteria
- Resection margin
- Reserpine
- Residence time
- Residence time distribution
- Residential care
- Residents
- Residual body
- Residual schizophrenia
- Residual volume
- Residue
- Resin
- Resin acid
- Resiniferatoxin
- Resiquimod
- Resistance
- Resistance mutation
- Resistance training
- Resistant starch
- Resistin
- Resistome
- Reslizumab
- Resocialization
- Resolvin
- Resonance frequency analysis
- Resonant cavity
- Resorcinol
- Resorption
- Resource
- Respect
- Respect for persons
- Respimat
- Respiration
- Respiratory acidosis
- Respiratory alkalosis
- Respiratory arrest
- Respiratory bronchiolitis interstitial lung disease
- Respiratory burst
- Respiratory center
- Respiratory chain
- Respiratory compensation
- Respiratory compromise
- Respiratory depression
- Respiratory disease
- Respiratory distress
- Respiratory distress syndrome
- Respiratory disturbance index
- Respiratory drive
- Respiratory droplets
- Respiratory epithelium
- Respiratory failure
- Respiratory hypersensitivity
- Respiratory inductance plethysmography
- Respiratory infections
- Respiratory insufficiency
- Respiratory mechanics
- Respiratory minute volume
- Respiratory monitoring
- Respiratory mucosa
- Respiratory muscle
- Respiratory muscles
- Respiratory quotient
- Respiratory sinus arrhythmia
- Respiratory system
- Respiratory therapists
- Respiratory tract
- Respiratory tract diseases
- Respiratory tract infections
- Respiratory zone
- Respirometer
- Respirovirus
- Respite care
- Response Evaluation Criteria in Solid Tumors
- Response bias
- Response factor
- Response inhibition
- Response regulators
- Response surface methodology
- Response variable
- Responsive neurostimulation device
- Rest
- Rest pain
- Restenosis
- Resting energy expenditure
- Resting heart rate
- Resting metabolic rate
- Resting potential
- Resting state
- Resting state fMRI
- Resting tremor