- diurnal
- diverge
- divergent
- divergent nozzle
- divergent strabismus
- diversion canal
- diversion dam
- diversion intake
- diversion tunnel
- diversity radar
- divert
- diverting dam
- diverting valve
- divide difference
- divide differency
- divided material
- divided tenon
- divider
- documentation centre
- doe
- doff
- doffer comb
- dog
- dog anchor
- dog coupling
- dog key
- dog wheel
- dogy
- dolerine
- dolly
- dolomitic lime
- dome dam
- dome light
- dome-shaped
- domestic building
- domestic coke
- domestic demand
- domestic fuel
- domestic refrigerator
- domestic sewage
- domestic waste
- dominant
- dominant discharge
- dominant fault
- dominant mode
- dominant wave
- dominate
- donkey
- donor level
- donor material
- doomsday
- door aperture
- door bar
- door bolt
- door casing
- door check
- door closer
- door furniture
- door glazing
- door handle
- door latch
- door lining
- door lintel
- door opening
- door sill
- door stile
- door transom
- door-hinge
- doorway
- dopebook
- doped crystal
- doped germanium
- doping
- Doppler modulation
- Doppler shift
- Doppler velocity
- doral view
- doran
- dormant volcano
- dormer
- dormer window
- dormitory
- dormitory area
- dorsal
- dorsoventral
- dose
- dose rate
- dosed syncline
- dosing machine
- dosing pump
- dot
- dot generator
- dot line
- dot pitch
- dot printer
- dot-dot
- dividing line
- dividing partition
- dividing slate
- division box