- EPCAM
- EPDM
- EPHA8
- EPHB3
- EPQ
- EPR
- EPS
- EPSDT
- EQ-5D
- ER retention
- ERAP2
- ERBB
- ERBB3
- ERBB4
- ERCC2
- ERCC4
- ERCC5
- ERG11
- ERG3
- ERP
- ERV3
- ERβ
- ESAT-6
- ESBL
- ESCRT
- ESKAPE
- ESR
- EST
- ETHE1
- ETS transcription factor family
- ETS1
- ETV6
- ETV6-NTRK3 gene fusion
- Eagle effect
- Eagle's minimal essential medium
- Eales disease
- Ear
- Ear drops
- Ear infections
- Ear lobes
- Ear mites
- Ear protection
- Ear surgery
- Ear wick
- Earaches
- Eardrum
- Eardrum perforation
- Early Detection Research Network
- Early adopters
- Early childhood
- Early childhood caries
- Early childhood development
- Early childhood intervention
- Early childhood trauma
- Early goal directed therapy
- Early goal-directed therapy
- Early left anterior negativity
- Early menopause
- Early onset dementia
- Early pregnancy loss
- Early prostate cancer
- Early psychosis
- Early response gene
- Early warning score
- Early-onset Alzheimer's disease
- Earmuffs
- Earplugs
- Earwax
- East syndrome
- Eastern equine encephalitis
- Eastern equine encephalitis virus
- Eating Attitudes Test
- Eating Disorder Diagnostic Scale
- Eating Disorder Inventory
- Eating behavior
- Eating disorder examination interview
- Eating disorders
- Eaton Lambert Syndrome
- Ebastine
- Ebers Papyrus
- Ebola
- Ebola hemorrhagic fever
- Ebola virus
- Ebolavirus
- Ebselen
- Ebstein anomaly
- Ebstein's anomaly
- Eburnation
- Ecallantide
- Ecamsule
- Ecarin
- Ecarin clotting time
- Ecchymosis
- Eccrine carcinoma
- Eccrine glands
- Ecdysis
- Ecdysone
- Ecdysone receptor
- Ecdysteroids
- Ecdysterone
- Ecgonine
- Echinacea
- Echinacea purpurea
- Echinacoside
- Echinenone
- Echinocandin
- Echinocandin b
- Echinocandins
- Echinococcosis
- Echinococcus
- Echinococcus granulosus
- Echinococcus multilocularis
- Echinocytes
- Echinomycin
- Echo chambers
- Echo planar imaging
- Echocardiography
- Echogenic intracardiac focus
- Echogenicity
- Echography
- Echoic memory
- Echolalia
- Echolocation
- Echopraxia
- Echothiophate
- Echovirus
- Eclabium
- Eclampsia
- Eclectic medicine
- Eco-anxiety
- EcoRI
- Ecological psychology
- Ecological study
- Ecological theory
- Econazole
- Economic analysis
- Economic development
- Economic incentives
- Ecorv
- Ecosystem health
- Ecotin
- Ecotoxicity
- Ectasia
- Ecthyma
- Ecthyma gangrenosum
- Ectodermal
- Ectodermal dysplasia
- Ectogenesis
- Ectoine
- Ectomesenchyme