| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Diophantine analysis | No definition provided | Christopher Rauch | 2023.12.01 |
| Diopside | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Dioptase | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Dioptrics | No definition provided | Christopher Rauch | 2023.12.01 |
| Diorama | No definition provided | Christopher Rauch | 2023.12.01 |
| Dioscorea | No definition provided | Christopher Rauch | 2023.12.01 |
| dip | The geomagnetic inclination angle. See geomagnetic elements. | Ryan McGranaghan | 2023.04.16 |
| dip | No definition provided | Ryan McGranaghan | 2023.04.16 |
| dip equator | An irregular, imaginary line around the Earth where the geomagnetic inclination angle is measured to be zero. It lies near the geographic equator. | Ryan McGranaghan | 2023.04.16 |
| Diphtheria | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria antitoxin | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria--Bacteriology | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria--Biochemic treatment | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria--Homeopathic treatment | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria--Hospitals | No definition provided | Christopher Rauch | 2023.12.01 |
| Diphtheria--Prevention | No definition provided | Christopher Rauch | 2023.12.01 |
| Dipleidoscope | No definition provided | Christopher Rauch | 2023.12.01 |
| Diplomacy | No definition provided | Christopher Rauch | 2023.12.01 |
| Diplomatic and consular service | No definition provided | Christopher Rauch | 2023.12.01 |
| Diplomatic and consular-service | No definition provided | Christopher Rauch | 2023.12.01 |