| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Oil | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil analysis | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil-cups | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil engines | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil feeders | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil-feeders | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil-fuel | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil industries | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil industries--Tables and ready-reckoners | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil inspection | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil-painting, | No definition provided | Christopher Rauch | 2023.12.01 |
| Oils and fats | No definition provided | Christopher Rauch | 2023.12.01 |
| Oils, Essential | No definition provided | Christopher Rauch | 2023.12.01 |
| oil shale | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Oil-shales | No definition provided | Christopher Rauch | 2023.12.01 |
| oil spill | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Oil-tank steamers | No definition provided | Christopher Rauch | 2023.12.01 |
| Oil-wells | No definition provided | Christopher Rauch | 2023.12.01 |
| Ointments | No definition provided | Christopher Rauch | 2023.12.01 |
| Ojebway Indians | No definition provided | Christopher Rauch | 2023.12.01 |