Digital stroboscopic photography

Digital ultrasonics for materials science

Digital watermarking technology

Digital-to-analog converter

Digitalis

Dill

Dilleniales

Dilleniidae

Dimension

Dimensional analysis

Dimensionless groups

Dimethyl sulfoxide

Dino-Birds

Dinocerata

Dinoflagellida

Dinophyceae

Dinosaur behavior

Dinosauria

Diode

Diopside

Diopter

Diorite

Dioscoreales

Dip-pen nanolithography

Diphtheria

Diplogasterida

Diplomonadida

Diplopoda

Diplura

Dipnoi

Dipole

Dipole moment

Dipole-dipole interaction

Dipsacales

Diptera

Direct current

Direct numerical simulation

Direct-coupled amplifier

Direct-current circuit theory

Direct-current generator

Direct-current motor

Direct-current transmission

Directed evolution

Direction-finding equipment

Directional coupler

Directivity

Disasteroida

Discovery of element 117

Discrete analytic functions

Discriminant

Disease

Disease ecology

Disease outbreaks in livestock in 2007 due to global warming

Diseases in marine mammals

Disjectoporidae

Dispersal versus vicariance

Dispersion (radiation)

Dispersion modeling in complex urban systems

Dispersion relations

Displacement current

Displacement pump

Distance-measuring equipment

Distillation

Distillation column

Distilled spirit

Distortion (electronic circuits)

Distributed generation (electric power systems)

Distributed propulsion

Distributed systems (computers)

Distributed systems (control systems)

District heating

Diving

Diving animal

Division

DNA and animal domestication

DNA barcoding in fungi

DNA helicase

DNA methylation

DNA microarray

DNA repair

DNA sequencing

DNA vaccination

Docodonta

Dog

Dogwood

Dolerite

Dolomite

Dolomite rock

Domain (electricity and magnetism)

Domestic robot

Domestication

Donkeys and allies

Donnan equilibrium

Donor atom

Dopamine

Doppler effect

Doppler radar

Doppler VOR

Dormouse

Dorylaimida