- external auditory canal
- external auditory meatus
- external-combustion engine
- external ear
- externalise
- externalism
- externalisms
- externalities
- externality
- externalize
- externalized
- externalizes
- externalizing
- external respiration
- externals
- external–combustion engine
- externe
- externs
- exteroceptor
- exteroceptors
- exterritorial
- extinct
- extinct
- extincted
- extincting