- dark blue
- dark bread
- dark lantern
- dark matter
- dark meat
- dark night
- dark or bright
- dark rain bearing cloud
- dark_brown
- dark_colored
- dark_coloured
- dark_complexioned
- dark_eyed junco
- dark_field microscope
- dark_gray
- dark_green
- dark_grey
- dactyloctenium aegypticum
- daddy longlegs
- daemon
- daftly
- daftness
- dagame
- dagbel—a dig mark symbolising commencement of a construction work (building road
- dagga
- dagger fern
- daggle
- dagon
- daguerre
- dahl
- dahlia pinnata
- daily bread
- daisy print wheel
- daisy leaved grape fern
- dame jean iris murdoch
- dame luck to be adversely disposed
- dame's violet
- damgalnunna
- daminozide
- dammar
- dammar pine
- dampen
- dance performance
- daniel ortega
- daniel patrick moynihan
- dank
- danmark
- dano_norwegian
- danseur
- dante gabriel rossetti