- Dodecanol
- Dodecylbenzene
- Dog clutch
- Dogger Bank Wind Farm
- Doherty amplifier
- Dolerite
- Dolomite
- Dolomitization
- Domain adaptation
- Domain analysis
- Domain controller
- Domain decomposition method
- Domain decomposition methods
- Domain engineering
- Domain model
- Domain name
- Domain of a function
- Domain of discourse
- Domain theory
- Domain walls
- Domain-driven design
- Domain-specific modeling
- Domes
- Domestic robot
- Dominance
- Dominance-based rough set approach
- Dominating set
- Domino logic
- Domoic acid
- Dongles
- Donnan potential
- Donor number
- Door
- Door closer
- Door handle
- Dopachrome
- Dopamine
- Dopamine agonists
- Dopamine antagonists
- Dopamine receptors
- Dopamine transporter
- Dopaminergic neurons
- Dopaquinone
- Doped
- Doping
- Doppler cooling
- Doppler echocardiography
- Doppler effect
- Doppler radar
- Doppler ultrasonography
- Doppler ultrasound
- Dorsal attention network
- Dorsal column
- Dorsal horn
- Dorsal motor nucleus
- Dorsal root
- Dorsal root ganglia
- Dorsal root ganglion
- Dorsalis pedis artery
- Dorsolateral prefrontal cortex
- Dorsomedial prefrontal cortex
- Dorsum
- Dosage form
- Dose
- Dose area product
- Dose fractionation
- Dose profile
- Dose rate
- Dose-volume histogram
- Dosimeters
- Dosimetry
- Dosing
- Dot blot
- Dot matrix
- Dot matrix printers
- Dot product
- Dot-com
- Dota-tate
- Dotatoc
- Dots
- Double
- Double binds
- Double bond
- Double bottom
- Double cone
- Double coset
- Double counting
- Double diamond
- Double diffusive convection
- Double factorial
- Double glazing
- Double helix
- Double hull
- Double inverted pendulum
- Double junction
- Double lattice
- Double layer
- Double layer forces
- Double minutes
- Double negation
- Double pendulum
- Double precision
- Double salts
- Double tees
- Double torus
- Double wishbone
- Double wishbone suspension
- Double-blind
- Double-clad fiber
- Double-ended queue
- Double-layer capacitance
- Double-skin facades
- Double-slit experiment
- Double-spending
- Doublesex
- Doublet state
- Doubling
- Doubling time
- Doubly ionized oxygen
- Doubly labeled water
- Doubly linked list
- Doubly stochastic matrix
- Doubtful Sound
- Dougong
- Dove prism
- Dowel
- Dowel bar retrofit
- Down syndrome
- Downcutting
- Downcycling
- Downforce
- Downhole heat exchanger
- Downlink
- Downsampling
- Downsizing
- Downspout
- Downstream
- Downstream processing
- Downtime
- Downwash
- Doxastic logic
- Dozen
- Drag
- Drag coefficient
- Drag crisis
- Drag equation
- Drag link
- Drag reducing agent
- Dragline
- Dragon kiln