SDNR
| Acronym | Definition |
|---|---|
| SDNR | Super Digital Noise Reduction |
| SDNR | signal difference to noise ratio |
| SDNR | San Diego Northern Railway |
| SDNR | Screw Down Non-Return (valve) |
| SDNR | Status, Data Not Ready (Alcatel) |
| SDNR | Scientific Domain Names Root |
| SDNR | Scientific Domain Names Registry |
| SDNR | Sex, Drugs and Rock 'n' Roll |