- Dry well
- Drying oil
- Drying tube
- Drywall
- Ducted fans
- Ductile iron
- Ductility
- Dulong-Petit law
- Dummy load
- Dump truck
- Duodenal
- Duplex stainless steel
- Durability
- Duralumin
- Dust
- Dust collection system
- Dyes
- Dynamic equilibrium
- Dynamic frequency scaling
- Dynamic mechanical analysis
- Dynamic voltage scaling
- Dyne
- Dypingite
- Dysprosium
- ECAE
- ECL
- EDM
- EHF
- EISCAT
- ELF
- EOR
- EPDM rubber
- EPR
- ERD
- EROI
- ERP
- ESBWR
- ESC
- ESR
- ETFE
- EVA
- Earth materials
- Earth observation satellites
- Earth's crust
- Earthquake engineering
- Earthquake swarms
- Earthquake-resistant structures
- Echocardiography
- Eclogite
- Eco-cement
- Ecohydrology
- Ecological economics
- Ecological footprint
- Ecology
- Economic appraisal
- Economies of scale
- Ecotoxicity
- Eddy
- Eddy currents
- Edema
- Edotreotide
- Effective nuclear charge
- Effective porosity
- Effective temperature
- Effervescence
- Efflorescence
- Egg cells
- Eigenstrain
- Eigenvalues and eigenvectors
- Einstein notation
- Einsteinium
- Ejecta
- Elastic collision
- Elastic modulus
- Elasticity
- Elasticity tensor
- Elastin
- Elastomeric
- Elastomeric bridge bearing
- Electric aircraft
- Electric arc
- Electric arc furnaces
- Electric battery
- Electric charge
- Electric current
- Electric dipole moment
- Electric field
- Electric light
- Electric motors
- Electric potential
- Electric potential energy
- Electric power
- Electric power industry
- Electric resistance welding
- Electric spark
- Electric susceptibility
- Electric vehicles
- Electric-field screening
- Electrical cable
- Electrical conductors
- Electrical connector
- Electrical efficiency
- Electrical energy
- Electrical grid
- Electrical impedance
- Electrical impedance tomography
- Electrical network
- Electrical resistivity tomography
- Electrical steel
- Electrical substation
- Electricity
- Electro-optic effect
- Electrocaloric effect
- Electrocardiography
- Electrochemical cell
- Electrochemical engineering
- Electrochemistry
- Electrochromic
- Electrocoagulation
- Electrode
- Electrode potential
- Electrodialysis
- Electroencephalography
- Electroforming
- Electroluminescence
- Electrolysis
- Electrolysis of water
- Electrolytes
- Electrolytic cells
- Electromagnetic coil
- Electromagnetic compatibility
- Electromagnetic fields
- Electromagnetic induction
- Electromagnetic pump
- Electromagnetic radiation
- Electromagnetic shielding
- Electromagnetic spectrum
- Electromagnetism
- Electromagnets
- Electromigration
- Electromotive force
- Electron
- Electron affinity
- Electron avalanche
- Electron capture
- Electron configuration
- Electron density
- Electron hole
- Electron mass
- Electron microscopes