- ear pinnae
- echolocation
- ecologist
- ecology
- ecosystem
- ectoderm
- ectoparasites
- ectotherms
- edentate
- egg
- electrophoresis
- elongate
- emarginate
- embayment
- embryo
- endangered
- endemic
- endoderm
- endoparasitic
- entomologist
- entomology
- Eocene
- epibiosis
- epidermal
- epidermis
- epipelagic
- estrus
- estuary
- eukaryote
- euphotic
- eusocial
- evolution
- extant
- extinct
- extirpate
- extralimital
- eye