OMZ
| Acronym | Definition |
|---|---|
| OMZ | Oxygen Minimum Zone (ocean seawater zone) |
| OMZ | Ossa-Morena Zone (geography; Portugal) |
| OMZ | Obedinennye Mashinostroitelnye Zavody (Russian Engineering Company, formerly United Heavy Machinery) |
| OMZ | Oh My Zeus (exclamation) |
| OMZ | Oh My Zelf |