D-4
Dacite
Dam
Damping
Dampproofing
Dangling bond
Dark current
Data
Data outlier
Database
Datum
Days of storage
DC to DC converter
DCE
DDTP
Deaccession
Dead ground
Dead space
Dead storage
Deadlock
Deadweight
Debitage
Debossing
Debouches
Debris cloud
Debris flow
Decadent trees
Deception repeater
Decibel
Deciduous
Deckle
Decollimation
Decompaction
Decomposers
Decomposition
DECON
Decorative arts
Decrypt
Deed of Gift
Deep cycle battery
Deep discharge
Deforestation
Degradation
Dehiscent
Deir el-Bahari
Delamination
Delta modulation
Delta notation
Demand assignment
Demobilization center
Dendrite
Dendritic
Dendritic web technique
Dendrochronology
Dendroclimatology
Dense
Density
Dentate
Denuded
Deoxyribose
Depilatory
Depletion zone
Deposition
Depth of discharge
Derivative work
Derrick
Desalination
Desiccant
Desiccate
Desiccation
Design month
Destructive analysis
Detached work
Detrital
Detritus
Devitrification
Dew
DGPS
Diabetes
Dialysis
Diameter
Diathesis
Diatom
Diatoms
Diatonic
Dichogamy
Dichotomous key
Dicot
Die-cut
Diesel
Diestrus
Differential correction
Diffuse insolation
Diffuse radiation
Diffusion furnace
Diffusion length
Diffusive transport
Digital
Dike
Diminutive
Dinoflagellate
Diode
Dioecious
Diorite
Dioritic gneiss
Diploid
Diplopia
Dipyramidal
Direct beam radiation
Direct connect
Direct current
Direct fuel cell
Direct insolation
Direct-sequence spread spectrum
Directional antenna
Dirigible
Dirty bomb
DISA
Disappearing carriage
Discharge
Discharge factor
Discharge rate
Disclosure
Disconnect
Disk flower
Dispersal
Disposal
Disposition
Disposition schedule
Disseminated
Dissociative anesthetic
Dissolved oxygen
Distal
Distorted crystal
Distributed energy resources
Distributed generation
Distributed power
Distributed systems
Disturbance
Ditch
Ditch both sides
Ditch in front
Ditch in rear
Dithering
Diurnal
Diurnal tide
Divergence
Diversity
Divine Office
Division
DNA
Dodecahedral
Dodecahedron
Doghair thickets
DOI
Dolerite
Dolomite
Domestic water use
Domestication
Dominant
Dominant species
Domoic acid
Donor
Donor level
Dopamine
Dopant
Doping
Doppler effect
Doppler shift
Dorsal
Dorset
Dosimeter
Dosimetry
Double helix
Double stop
Doughboy
Downlink
Download
Downstream
Downtime
Downwelling
Dragoon
Drainage
Drainage basin
Drawbar
Drawdown
Dredging
Dress parade
Drift
Drip irrigation
Drone
Drop inlet
Dross
Drug
Drug abuse
Druse
Dry cell
Dry cleaning
Dry laid
Drypoint
Drywell
DSLAM
DTE
Ductile
Dull
Duple
Duripan
Dust grains
Duty cycle
Duty rating
DWDM
Dynamic viscosity
Dysarthria
Dysmenorrhea
Dysplasia
Dyspnea
Dystocia