- delivery specification
- delivery speed
- delivery truck
- delivery tube
- delivery tunnel
- delivery valve
- delta
- delta circuit
- delta connection
- delta modulation
- delta network
- delta region
- deltafication delta
- deltaic
- deltaic delta
- deluge
- delustrants
- delustre
- deluvial deposit
- delve
- demagnetization
- demagnetization coefficient
- demagnetization curve
- demagnetize
- demagnetizer
- demagnetizing
- demagnetizing force
- demagnetizing machine
- demand
- deadwood
- deaerator
- deallocation
- deasphalting
- debacle
- debit
- debiteuse
- debris
- debris fall
- debye temperature
- decade
- decade scale
- decadent wave
- decagon
- decahedron
- decalcification
- decameter wave
- decamp
- decanting
- decatenate
- decay constant
- decayed rock
- decaying wave
- decelerating force
- decentralization
- deci
- decide
- decimal counter
- decimal symbol
- decimeter
- decimetric wave
- decision algorithm
- Decision function
- decision table
- decking spike
- deckle strap
- declarant
- declarator
- declare
- declivity
- decode unit
- decoding circuits
- decoiling
- decollation
- decolorisation
- decomposed curve
- decomposed rock
- decompression chamber
- decompressor
- deconvolution
- decoration glass
- decorative concrete
- decorative lamp
- decoupling
- decoupling condenser
- decreasing wave
- decrement factor
- decrepitation test
- dedendum line
- dedicated computer
- deducible rule
- deductive
- dedusting
- deed
- deenergize
- deep cut
- deep sand
- deep water
- deep-bore
- deep-etch
- deep-seated