- Design document
- Design education
- Design effect
- Design engineer
- Design fiction
- Design flow
- Design for X
- Design for all
- Design for inspection
- Design for the environment
- Design knowledge
- Design language
- Design life
- Design manual for roads and bridges
- Design matrix
- Design of experiments
- Design optimization
- Design paradigm
- Design patent
- Design patterns
- Design prototyping
- Design rationale
- Design research
- Design review
- Design science
- Design space exploration
- Design system
- Design thinking
- Design to cost
- Design tools
- Design-build
- Design-to-cost
- Desizing
- Desktop computer
- Desktop environment
- Desktop metaphor
- Desmin
- Desmoglein
- Desmosomes
- Desolder
- Desorption
- Desorption electrospray ionization
- Desquamation
- Dess-Martin periodinane
- Destructive testing
- Destructor
- Desulfobacterales
- Desulfotomaculum
- Desulfovibrio desulfuricans
- Desulfovibrio vulgaris
- Desulfurization
- Desulfuromonadales
- Detached eddy simulation
- Detailed balance
- Detailed engineering
- Detection limit
- Detector
- Detention basins
- Detention dam
- Detention tanks
- Detergent
- Determinant
- Deterministic
- Deterministic algorithms
- Deterministic automaton
- Deterministic encryption
- Deterministic global optimization
- Deterministic simulation
- Deterministic system
- Detonating cord
- Detonation
- Detonation nanodiamond
- Detonation spraying
- Detonation velocity
- Detonation wave
- Detoxification
- Detrended correspondence analysis
- Detrital
- Detritivores
- Detritus
- Detrusor muscle
- Deuterated solvents
- Deuterium fusion
- Developable surfaces
- Developmental biology
- Developmental disorders
- Developmental robotics
- Developmental systems theory
- Developmental toxicity
- Deviance
- Deviance information criterion
- Deviation
- Device drivers
- Device manufacturers
- Device-to-device
- DeviceNet
- Dew
- Dew point
- Dewatering
- Dexamethasone
- Dexron
- Dextral
- Dextran
- Dextran 1
- Dextrin
- Dextrose equivalent
- Diabase
- Diabetes
- Diabetic nephropathy
- Diabetic retinopathy
- Diacetyl
- Diacetylene
- Diachronous
- Diacylglycerol
- Diadinoxanthin
- Diafiltration
- Diagenesis
- Diagnosis
- Diagnosis codes
- Diagnosis-related group
- Diagnostic odds ratio
- Diagonal
- Diagonal matrix
- Diagonal relationship
- Diagonalizable
- Diagonalizable matrix
- Diagonally dominant
- Diagrid
- Dial
- Dial indicators
- Dialing
- Diallyl disulfide
- Dialog manager
- Dialogflow
- Dialysis
- Diamagnetic
- Diamagnetic ring current
- Diamagnetism
- Diamantane
- Diameter at breast height
- Diamictite
- Diamines
- Diaminopimelic acid
- Diammonium phosphate
- Diamond
- Diamond blades
- Diamond cubic
- Diamond drilling
- Diamond grinding
- Diamond interchange