| Acronym | Definition |
|---|
| D | Day |
| D | 500 (Roman numeral) |
| D | Daily |
| D | Digital |
| D | Division |
| D | Depth |
| D | Democrat |
| D | Decimal |
| D | Denver, Colorado (mint mark) |
| D | Battery Size |
| D | Calciferol (vitamin) |
| D | Below Average grade |
| D | Denarius/Penny (nail size) |
| D | Data |
| D | Date |
| D | Drive |
| D | Director (Drone Control; US military aircraft designation; as in D-21) |
| D | Drive (automatic transmissions) |
| D | Display |
| D | Discuss |
| D | Dead |
| D | Degree |
| D | Defense |
| D | Device |
| D | Distance |
| D | Dedicated (Channel) |
| D | Draw (a tie; sports) |
| D | Daughter |
| D | Dutch |
| D | Delay |
| D | Diversity |
| D | Duke (British title of nobility) |
| D | Delta |
| D | Dragon (Yu-Gi-Oh!) |
| D | Datum |
| D | Drum |
| D | Dublin (car registration identification) |
| D | Demonstration |
| D | Density |
| D | Depot |
| D | Penny (old British penny) |
| D | Departure |
| D | Diesel |
| D | Dimensional |
| D | Drain (transistor; electronics) |
| D | Derivative |
| D | Digit |
| D | Diameter |
| D | Differential |
| D | Doctrine |
| D | Detective (police) |
| D | Detective (NSW, Australia) |
| D | Düsseldorf (Germany) |
| D | Dependency |
| d | Deaf (person who can not hear but is not part of the Deaf Community) |
| D | Diamonds (playing cards) |
| D | Directing |
| D | Dummy |
| D | Deaf (member of the Deaf Community who shares a sense of Deaf Culture) |
| D | Daytime (broadcasting operating schedule) |
| D | Deed (real estate) |
| D | Disconnect |
| D | Diablo (roleplaying game) |
| D | Deceased |
| D | Doubtful (player's likelihood of participating) |
| D | Denominator |
| D | Diode |
| D | Tenacious D (band) |
| D | Dorsal |
| D | Dielectric |
| D | Dinar |
| D | Diners Club (credit card) |
| D | Decrement |
| D | Defenseman (hockey) |
| D | Desperados (game) |
| D | Deci- (metric prefix, 1/10) |
| D | Diastolic (blood pressure) |
| D | Tunisian Dinar (unit of currency) |
| D | Decedent (IRB) |
| D | Deuterium |
| D | Denarius (Roman Coin) |
| D | Aspartic Acid (amino acid) |
| D | Diamox (medicine) |
| D | Deutschland (Germany) (International Auto Identification) |
| D | Dallas, TX, USA |
| D | Diffusion Coefficient |
| D | Diaphragmatic |
| D | Debye (unit of dipole moment) |
| D | Delete(d) (action code) |
| D | Diopter (unit of optical power) |
| D | Dominion Resources Inc (stock symbol) |
| D | Absorbed Dose |
| D | Distance Vision |
| D | Derated |
| D | Degaussing |
| D | Drag Force (aerodynamic equations) |
| D | Duty Factor |
| D | Dahlonega, Georgia (mint mark, 1838-61) |
| D | Doubleword |
| D | Dextrorotary (clockwise optical rotaton) |
| d | surface drift (US DoD) |
| D | Die/Dice (role play reference) |
| D | Pneumatic Post (Scott Catalogue prefix; philately) |
| D | Documentary Division |
| D | Drift distance |
| D | D Sub-Shell (third outer subshell of an electron shell) |
| D | District spare (Stores 100 code) |
| D | Federal Reserve Bank of Cleveland, Ohio (designates original point of circulation of a dollar bill) |
| D | Deutschverzeichnis (Works of Schubert by Otto Erich Deutsch) |
| D | Cohen's Measure of Effect Size (statistics; usually expressed as italic d) |
| D | Undenominated United States Stamp (22 cents, introduced 17 Nov 1985) |
| D | total drift, data (US DoD) |
| D | Total Outside Dose (radiation) |