| Acronym | Meaning |
![](file.png) | RIR | Reference-intensity Ratio |
![](file.png) | RIS | Radiation-induced Segregation |
![](file.png) | RIS | Resonance Ionization Spectrometry |
![](file.png) | RIS | Rotational Isomeric State |
![](file.png) | RISA | Radioimmunosorbent Assay |
![](file.png) | RISA | RDNA Internal Spacer Analysis |
![](file.png) | RISC | Reduced-instruction-set Computer |
![](file.png) | RISE | Radiative Inputs From Sun To Earth |
![](file.png) | RISM | Reference Interaction Site Model |
![](file.png) | RITD | Resonant Interband Tunneling Diode |
![](file.png) | RITE | Research Institute Of Innovative Technology For The Earth (Japan) |
![](file.png) | RITG | Radiatively Important Trace Gases |
![](file.png) | RITP | Recycling Isotachophoresis |
![](file.png) | RITS | Radiatively Important Trace Species |
![](file.png) | RITZ | Regulatory And Investigative Treatment Zone |
![](file.png) | RIXS | Resonant Inelastic X-ray Scattering |
![](file.png) | RKB | Restricted Kinetic Balance (method In Calcns. Of Wave Functions And Energies) |
![](file.png) | RKHS | Reproducing Kernel Hilbert Space |
![](file.png) | RKI | Rotary Kiln Incinerator |
![](file.png) | RKKR-GF | Relativistic Koringa-Kohn-Rostoker Green Function |
![](file.png) | RKKY | Ruderman-Kittel-Kasuya-Yoshida (indirect Electron Exchange Mechanism) |
![](file.png) | RKRVL | Rydberg-Klein-Rees-Vanderslice-Lakshman (for Potential Energy) |
![](file.png) | RLA | Resonant Laser Ablation |
![](file.png) | RLCA | Reaction-limited Cluster Aggregation |
![](file.png) | RLF | Radially Localized (wave) Function |
![](file.png) | RLM | Reflected Light Microscopy |
![](file.png) | RLM | Rotating Linear Model (for Effective Potential Surfaces In Coupled-channel Calcns. On Reactive Scattering) |
![](file.png) | RLMTO | Relativistic Linear Muffin-tin Orbital |
![](file.png) | RLP | Reactive Liquid Polymer |
![](file.png) | RLPPS | Reactive Low-pressure Plasma Spraying |
![](file.png) | RLS | Recursive Least Squares (algorithm) |
![](file.png) | RLS | Resonance Light Scattering |
![](file.png) | RLT | Riemann-Liouville Transform |
![](file.png) | RLV | Reusable Launch Vehicles (aeronautics) |
![](file.png) | RMA | Rocky Mountain Arsenal (Colorado) |
![](file.png) | RMAN | Recovered Materials Advisory Notice |
![](file.png) | RMAPS | Receptor Model Applied To Patterns In Space |
![](file.png) | RMBPT | Relativistic Many-body Perturbation Theory |
![](file.png) | RMC | Relativistic Multiconfiguration |
![](file.png) | RMC | Reverse Monte Carlo |
![](file.png) | RMCL | Recommended Maximum Contaminant Level |
![](file.png) | RMCSTEP | Repartitioned Multiconfigurational Spin-tensor Electron Propagator |
![](file.png) | RME | Reasonably Maximally Exposed |
![](file.png) | RME | Reduced Matrix Equations |
![](file.png) | RMF | Rotating Morse Function (in Potential-surface Calcn.) |
![](file.png) | RMLC | Recommended Maximum Contaminant Level |
![](file.png) | RMM | Relative Molecular Mass |
![](file.png) | RMO | Rotated Morse Oscillator (function For Potential Surface) |
![](file.png) | RMOS | Rotated Morse Oscillator Spline (function For Potential Surface Calcn.) |
![](file.png) | RMP | Risk Management Program |