| RLR | right lateral rectus [muscle] |
|---|---|
| RMR | relative maximum respone; resting metabolic rate; right medial rectus [muscle] |
| RSR | regular sinus rhythm; relative survival rate; right superior rectus [muscle] |
| SR | sarcoplasmic reticulum; saturation recovery; scanning radiometer; screen; secretion rate; sedimentat... |
| SRM | spontaneous rupture of membranes; Standard Reference Material; superior rectus muscle |