| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Porpoises | No definition provided | Christopher Rauch | 2023.12.01 |
| Portable buildings | No definition provided | Christopher Rauch | 2023.12.01 |
| Portable engines | No definition provided | Christopher Rauch | 2023.12.01 |
| Portable houses | No definition provided | Christopher Rauch | 2023.12.01 |
| Portable steam-engines | No definition provided | Christopher Rauch | 2023.12.01 |
| Portages | No definition provided | Christopher Rauch | 2023.12.01 |
| Portals | No definition provided | Christopher Rauch | 2023.12.01 |
| Portals and user interfaces | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Port Arthur--Siege, 1904-1905 | No definition provided | Christopher Rauch | 2023.12.01 |
| Port charges | No definition provided | Christopher Rauch | 2023.12.01 |
| Porter | No definition provided | Christopher Rauch | 2023.12.01 |
| Porthetria dispar | No definition provided | Christopher Rauch | 2023.12.01 |
| Port Hudson, La.--Siege, 1863 | No definition provided | Christopher Rauch | 2023.12.01 |
| Portland cement | No definition provided | Christopher Rauch | 2023.12.01 |
| Portlandite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Port Mahon--Siege, 1756 | No definition provided | Christopher Rauch | 2023.12.01 |
| Port Mahon--Siege, 1756- | No definition provided | Christopher Rauch | 2023.12.01 |
| Portola’s expedition, 1769-1770 | No definition provided | Christopher Rauch | 2023.12.01 |
| Porto Rican literature | No definition provided | Christopher Rauch | 2023.12.01 |
| Porto Rico--Hist | No definition provided | Christopher Rauch | 2023.12.01 |