| Term | Definition | Contributor | Modified |
|---|---|---|---|
| Omnibuses | No definition provided | Christopher Rauch | 2023.12.01 |
| Omongwaite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Omphacite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Omphalorrhagia | No definition provided | Christopher Rauch | 2023.12.01 |
| Onanism | No definition provided | Christopher Rauch | 2023.12.01 |
| Ondrejov_Observatory | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Oneida community, limited | No definition provided | Christopher Rauch | 2023.12.01 |
| Oneida (Corvette) | No definition provided | Christopher Rauch | 2023.12.01 |
| Oneida Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Oneillite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Onion | No definition provided | Christopher Rauch | 2023.12.01 |
| Online | Directly accessible electronically. | Ryan McGranaghan | 2023.04.16 |
| Onneiout Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Onofrite | No definition provided | Ryan McGranaghan | 2023.04.16 |
| Onomatopoeia | No definition provided | Christopher Rauch | 2023.12.01 |
| Onomatopoeia: Oratory: Philology | No definition provided | Christopher Rauch | 2023.12.01 |
| Onondaga Indians | No definition provided | Christopher Rauch | 2023.12.01 |
| Onondaga Indians--Missions | No definition provided | Christopher Rauch | 2023.12.01 |
| Onondaga language | No definition provided | Christopher Rauch | 2023.12.01 |
| Onoratoite | No definition provided | Ryan McGranaghan | 2023.04.16 |