- demolish
- demolition
- demon
- demonstrable
- demonstration
- demonstration room
- demote
- demoulding
- demountable building
- demultiplex
- demultiplexer
- den
- denary notation
- denatured alcohol
- dendrite
- dendritic
- denesting machine
- denial
- denickelization
- denomination
- denominator
- dense
- dense concrete
- dense medium
- dense packer
- dense sand
- dense wood
- densitometer
- density
- density class
- density distribution
- density measurement
- dent
- dental
- dental cement
- dental ceramic
- dental prosthesis
- dented
- denudation
- denuded
- denumerable
- denumerable set
- deodorant
- deodorizing
- deoxidation
- deoxycholic acid
- depart
- department
- dependable
- dependable discharge
- dependable inflow
- dependency
- dependent
- dependent of
- Dependent variable
- dephase
- dephlegmation
- depiction
- depleted
- depletion
- depletion layer
- depolarize
- deposited
- deposited moraine
- deposited resistor
- deposition
- deposits
- depreciation charge
- depress thread
- depressed arch
- depression angle
- depression curve
- depth
- depth gage
- depth record
- depth trip
- depulping screen
- derive
- derived class
- derived data
- derived relation
- dermatomycosis
- derrick boast
- derrick crane
- derrick floor
- derrick platform
- desalination
- desalinize
- desanding
- descaling
- descendant structure
- descenders
- descent orbit
- descrambler
- describe
- descriptive text
- descriptor
- descriptor language
- desensitization
- desert