- direct electric current
- dynamic accuracy
- dynamic similitude
- dynamic refraction
- door to door
- disincentive
- drag coefficient
- delirium tremens
- digital subscriber line
- drythematous eruption
- dual density
- dual channel mode
- dichotomy
- dryopteris thelypteris pubescens
- duality theorem
- dip switch
- dual intensity
- dual simplex method
- diane de poitiers
- down feather
- ductile yield
- ducol_punched card
- digestive tract
- duct of wirsung
- duct of bellini
- ductus venosus
- ductus endolymphaticus
- dulcified mercury
- dieffenbachia sequine
- dummy control section
- dummy argument
- dorbeetle
- dippers
- duodenal secretin test
- duodenostomy
- duplesx kidney
- duodenal web
- duodenum inversion
- duplexing
- duplex operation
- duplex placenta
- duplicitas
- duplicitas posterior
- dural endothelioma
- dyushambe
- dust borne infection
- dust allergy
- dust reticulation
- dog house
- dirty bomb