DDD

DDD or Triple D may refer to:

Science and medicine

Defined daily dose, a World Health Organization statistical measure of drug use
Degenerative disc disease, a common disorder of the lower spine
Dense deposit disease, the preferred name for Membranoproliferative glomerulonephritis Type II
Dichlorodiphenyldichloroethane, a breakdown product of DDT
Dual pacing, dual sensing and dual response modes of a pacemaker
Depersonalization-derealization disorder, a psychiatric disorder involving feelings of oneself or the world being unreal, distant, or detached

Data Display Debugger or GNU DDD, a popular graphical user interface for command-line debuggers
Digital Divide Data, a social enterprise providing disadvantaged youths in Cambodia, Laos and Kenya with IT education and training
Direct distance dialing, a method for telephone subscribers to call long-distance numbers without operator assistance
DDD, the SPARS code for a CD that was recorded, mixed, and mastered digitally
Domain-driven design, a methodology and set of priorities for programming
Developer! Developer! Developer!, a series of community conferences for software developers
3D Systems (DDD), a company that makes devices for stereolithography or 3D printing

DDD, a bra size
Delta Delta Delta, a national collegiate sorority
Denali Destroyer Dolls, roller derby league based in Wasilla, Alaska
Dictionary of Deities and Demons in the Bible, an academic reference work
Destroy Dick December, follow-up to No Nut November
Die-deterioration doubling, a minting error on coins
Doe Triple-D, a make of tractor
Dhaalu Airport, Dhaalu Atoll, Maldives, IATA code DDD
Dongotono language of Southern Sudan, ISO 639-3 language code ddd
Doomsday device, a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.