| Acronym | Definition |
|---|
| RNU➣Republican Network for Unity (Ireland) |
| RNU➣Règlement National d'Urbanisme (French: National Planning Regulations) |
| RNU➣Russian National Unity (political movement) |
| RNU➣Raiders News Update |
| RNU➣Retail News Update |
| RNU➣Radiology-Nuclear Medicine |
| RNU➣Radar Netting Unit |
| RNU➣Relative Nitrogen Utilization (biochemistry) |
| RNU➣Regional Neuroscience Units (UK) |