external control
external cortex
external costs
external cues
external data
external debt
external defibrillation
external defibrillators
external device
external diameter
external disturbances
external domain
external donor
external drainage
external ear

external ear canal
external economies
external effects
external electric
external electric field
external electromagnetic field
external enemy
external environment
external evaluation
external evaluator
external events
external face
external factors
external field
external finance
external financing

external fixation
external forces
external forcing
external funding
external genital
external genitalia
external granular layer
external iliac arteries
external imbalances
external impact
external influences
external information
external inputs
external interference
external intervention
external irradiation

external knowledge
external ligand
external load
external locus
external loop airlift bubble column
external magnetic field
external malformations
external mass transfer
external measures
external medium
external monitoring
external morphology
external network
external organizations
external part
external parties

external partners
external perturbation
external pH
external plexiform layer
external potential
external pressure
external quality assessment
external quality assessment scheme
external quantum efficiency
external radiation