- echinodermata
- eclair
- eclampsia
- eclectic
- ecliptic
- economical
- ectasia
- ectasis
- ectoparasite
- ectopic gestation
- essence
- ectozoa
- ecumenical
- edelweiss
- edentate
- electrocardiogram
- edgeways
- edict
- expulsion
- exquisite
- extemporaneous
- explosive mixture
- exponential
- exponential curve
- exponential series
- exposition
- exposed
- exposure meter
- expound
- expendable
- expenditure
- expensive
- experimental
- extempore
- experimentation
- extemporize
- extended family
- extensive
- exterior
- exterminate
- extern
- external gill
- external ear
- exterritorial
- expiate
- explanation
- exploitation
- extinction angle
- extirpate
- extortion