- diversity
- disintegration
- dislocation density
- disordered
- dispersionless
- displacement current
- display
- display refrigerator
- disruptive discharge
- dissipater
- dissolved ammonia
- dissonance
- distance modulus
- distortion-free
- distributed control
- distribution circuit
- distribution factor
- diurnal
- domain wall
- domestic refrigeration
- dominant
- dominant wave
- donor center
- door locker
- doping
- Doppler broadening
- Doppler limit
- Doppler width
- dot
- divisor
- Dobrowolsky generator
- domain
- domain boundary
- domain growth
- donor impurity
- door heater
- doorknob capacitor
- dope
- doped
- dose equivalent
- dosimeter
- double beam
- double bridge
- double column
- double door
- double impulse
- double range
- double refracting
- double way
- down conductor
- down-converter
- down-lead
- downward flow
- drain
- drain wire
- drained cable
- drift sliding
- driven array
- drop-forge
- drop-shaped
- drum winding
- dry circuit
- dotted index
- double
- double acting
- double armature
- double end
- double entry
- double expansion
- double purpose
- double star
- double wave
- double winding
- doublebase diode
- doublet
- doubling
- doubly degenerate
- draft
- draft ventilator
- draught
- drier tube
- drift effect
- drift wave
- dripping moisture
- drive
- drop wire
- dry bulb
- dry filter
- dry tons
- dry-compression
- drying cycle
- drying effect
- drying operation
- drying process
- dualism
- duct thermostat
- ducting
- ductwork arrangement
- Dufour effect
- Dufour number