| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Hiortdahlite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Hip--Excision | No definition provided | Christopher Rauch | 2023.12.01 |
| Hip-joint | No definition provided | Christopher Rauch | 2023.12.01 |
| Hip-joint--Diseases | No definition provided | Christopher Rauch | 2023.12.01 |
| Hip-joint--Dislocation | No definition provided | Christopher Rauch | 2023.12.01 |
| Hippology | No definition provided | Christopher Rauch | 2023.12.01 |
| Hippophagy | No definition provided | Christopher Rauch | 2023.12.01 |
| Hippopotamus | No definition provided | Christopher Rauch | 2023.12.01 |
| Hippuric acid | No definition provided | Christopher Rauch | 2023.12.01 |
| Hirayama families | No definition provided | Ryan McGranaghan | 2023.04.16 |
| H I regions | A region of neutral (atomic) hydrogen in interstellar space. At least 95 percent of interstellar hydrogen is H I. It emits radio waves that are 21 cm long. | Ryan McGranaghan | 2023.04.16 |
| Hirondelle (Yacht) | No definition provided | Christopher Rauch | 2023.12.01 |
| Hirudinidae | No definition provided | Christopher Rauch | 2023.12.01 |
| Hirundinidae | No definition provided | Christopher Rauch | 2023.12.01 |
| HI shells | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Hisingerite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Hispano-American war, 1898 | No definition provided | Christopher Rauch | 2023.12.01 |
| hiss | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Hist.--Carlist war, 1873-1876- | No definition provided | Christopher Rauch | 2023.12.01 |
| histisol | No definition provided | Ryan McGranaghan | 2023.04.16 |