- definite quantity
- definite timetable
- definition
- deflagration
- deflashing
- deflect
- deflecting coil
- deflecting force
- deflection angle
- deflection curve
- deflection factor
- deflection sensitivity
- deflection Yoke
- deflocculation
- defoamer agent
- defogging fan
- deformable
- deformation diagram
- deformation modulus
- deformed
- deformed reinforcement
- deformity
- defrost
- defrost method
- defrosting arrangement
- defrosting grid
- defrosting process
- degas
- degaussing
- degenerate
- degenerated semiconductor
- degeneration factor
- degraded minute
- degreasing agent
- degree
- degree Celsius
- degree graduation
- dehydration
- delaminating
- delay counter
- delay distortion
- delay lamp
- delay relay
- delayed combustion
- delayed feedback
- delayed payment
- delayed relay
- delete overlay
- deleting
- deleting text
- deletion
- delimate
- delime
- deliming
- delimit
- delimitation
- delimiter
- delimiter character
- delimiter characters
- delimiter line
- delineascope
- delineate
- delineation
- delineator
- delink
- deliquesce
- deliquescence
- deliquescent
- deliquium
- deliver
- deliverer
- delivery
- delivery air
- delivery capacity
- delivery chamber
- delivery channel
- delivery cock
- delivery condition
- delivery conduit
- delivery date
- delivery delay
- delivery free
- delivery head
- delivery hose
- delivery lift
- delivery line
- delivery main
- delivery man
- delivery order
- delivery orifice
- delivery pipe
- delivery pipeline
- delivery port
- delivery pressure
- delivery price
- delivery pump
- delivery rate
- delivery schedule
- delivery side
- delivery space