DD (double density) disk
ddd
DDDS (double density double sided) disk
dde
ddt
d.d.t.
ddvp
De-Broglie wave
de facto
de facto standard
de-ice
de-icer
de jure
de luxe
de rigueur
de trop
deacidification
deacidify
deacon
deaconess
deaconship
deactivate
deactivation
dead
dead-alive
dead-beat
dead center
dead centre
dead coil
dead colour