| RIBS | Rutherford ion backscattering |
|---|---|
| RIC | right internal carotid [artery]; Royal Institute of Chemistry |
| RICE | rest, ice, compression, and elevation |
| RICM | right intercostal margin |
| RiCoF | ristocetin cofactor |
| RICP | recurrent intrahepatic cholestasis of pregnancy |
| RICU | respiratory intensive care unit |
| RID | radial immunodiffusion; remission-inducing drug; ruptured intervertebral disc |
| RIF | Rifampin |
| RIF | radiological interface; release-inhibiting factor; rifampin; right iliac fossa; rosette-inhibiting factor |