| Abbreviation | Definition |
|---|---|
| RLL | Ranbaxy Laboratories Limited |
| RLSS | Research Laboratory Safety Services |
| RLU | Relative Light Unit |
| RM | Rotation Measure |
| RMBL | Rocky Mountain Biological Laboratory |
| RMF | ribosome modulation factor |
| RML | Regional Medical Laboratories |
| RML | Regional Medical Laboratory |
| RML | Rocky Mountain Laboratories |
| RML | Rush Medical Laboratories |
| RMP | Resting Membrane Potential |
| RMRL | Robotics and Mechatronics Research Laboratory |
| RMRL | Robotics Mechatronics Research Laboratory |
| RMRL | Rohto Mentholatum Research Laboratories |
| RMT | Registered Medical Technologist |
| RMW | Regulated Medical Waste |
| RNA | Ribo Nucleic acid |
| RNL | Rangel Neuroeconomics Laboratory |
| RNLI | Royal National Laboratory of Induction |
| RNM | Resource Needs Model |