- declination
- decline
- decoder
- decoding
- decollate
- decolorise
- decolorizing
- decompaction
- decompose
- decomposed stone
- decomposition value
- decompress
- decontaminant
- decorative coating
- decorative cutting
- decorative plaster
- decouple
- decoupling capacitor
- decreasing motion
- decrement
- decrypt
- decussatio
- decyne
- dedicated line
- deductive database
- dedust
- dedusting unit
- deep
- deep chilling
- deep drill
- deep foundation
- deep truss
- deep-drawn
- deep-refrigeration
- deep-sea
- defecation
- defect
- defects
- deferred
- deferred exit
- definite report
- definition module
- definitions
- deflecting cam
- deflecting valve
- deflection defocusing
- deflection meter
- deflection test
- deflectometer
- deflector chute
- deflocculate
- deflocculating
- defoamant
- deform
- deformable curve
- deformation increment
- defrostation
- defrosting department
- degasify
- degassing
- degausser
- degeneration
- degenerative feedback
- degradation
- degrade
- degreasing
- degreasing plant
- degree Engler
- degree Kelvin
- dehiscence
- dehumidify
- dehumidifying
- dehydrated
- dehydrating agent
- dehydrator capacity
- dehydrogenate
- deicing
- deionization
- deionize
- dejagging
- dekaline
- delaminate
- delamination
- delatching
- delay
- delay cap
- delay completion
- delay detonator
- delay element
- delay instruction
- delay line
- delay period
- delay time
- delayed broadcast
- delayed carry
- delayed flux
- delayed freezing
- Delayed Tests
- delegate
- delegation