| PID | pain intensity difference [score]; pelvic inflammatory disease; photoionization detector; picture im... |
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| PIVD | protruded intervertebral disk |
| RID | radial immunodiffusion; remission-inducing drug; ruptured intervertebral disc |
| RIVD | ruptured intervertebral disc |
| fibrous ring of intervertebral disc | The ring of fibrocartilage and fibrous tissue forming the circumference of the intervertebral disc; surrounds the nucleus pulposus, which is prone to herniation when the annulus fibrosus is compromised. Synonym: annulus fibrosus disci intervertebralis, annulus fibrosus, fibrous ring of intervertebral disc, fibrous ring. (05 Mar 2000) |
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