- Exact differential
- Excavators
- Excimer
- Excimer lasers
- Excipients
- Excited states
- Excitotoxicity
- Excretion
- Exergy
- Exfoliated graphite nanoplatelets
- Exhaust gas
- Exhaust system
- Exoskeletons
- Exothermic process
- Exothermic reaction
- Exothermic welding
- Expanded clay aggregate
- Expanded metal
- Expansion joints
- Expansion ratio
- Expansive clay
- Experimental Breeder Reactor II
- Explosives
- Exponential decay
- Extensional viscosity
- External ballistics
- Externality
- Extracellular fluid
- Extractive metallurgy
- Extreme value theory
- Extrinsic semiconductor
- Extrusion
- Eye drops
- Eye protection
- Eye tracking
- F region
- FCAW
- FCS
- FEP
- FFF
- FGD
- FIB
- FKM
- FLOPS
- FM
- FOD
- FR-4
- FRP
- Fabric structures
- Factor of safety
- Factors of production
- Fading
- Fail-safe
- Failure causes
- Falsework
- Fan
- Fan vault
- Faraday cage
- Faraday's constant
- Fast-ion conductor
- Fast-neutron reactor
- Fastener
- Fat
- Fatigue
- Fatigue limit
- Fatigue testing
- Fatty acids
- Faujasite
- Fault coverage
- Fault tolerance
- Faults
- Fayalite
- Feldspar
- Felsic
- Felsite
- Felt
- Fence
- Fenske equation
- Fenton's reagent
- Fermi level
- Fermi liquid theory
- Fermi surface
- Fermions
- Feroxyhyte
- Ferrihydrite
- Ferrimagnetic
- Ferrite
- Ferritic stainless steel
- Ferritin
- Ferroalloys
- Ferrocement
- Ferrocene
- Ferrocerium
- Ferrochelatase
- Ferromagnetism
- Ferrosilicon
- Ferrotitanium
- Ferrous
- Ferrous metallurgy
- Feshbach resonance
- Fever
- Fiber
- Fiber pull-out
- Fiber-reinforced composites
- Fiber-reinforced concrete
- Fiberboard
- Fiberglass
- Fibre cement
- Fibrils
- Field capacity
- Field electron emission
- Field ion microscope
- Field strength
- Field-effect transistor
- Field-emission electric propulsion
- Figure of merit
- Filament winding
- Filamentous carbon
- File
- Filler
- Filler metal
- Fillets
- Filtration
- Fineness
- Fingerprint
- Finite difference method
- Finite element method
- Fins
- Fire clay
- Fire doors
- Fire extinguishers
- Fire protection
- Fire retardant
- Fire safety
- Fire sprinkler
- Fire-resistance rating
- Fire-setting
- Fire-tube boiler
- Firebox
- Fireproofing
- Fires
- Firestop
- Firewalls
- Firewood
- Fireworks
- Firing pin
- Firmware
- First aid
- First law of thermodynamics
- First moment of area