| P&R | pelvic and rectal [examination]; pulse and respiration |
|---|---|
| PRF | partial reinforcement; patient report form; perforin; plasma recognition factor; pontine reticular f... |
| PRP | physiologic rest position; pityriasis rubra pilaris; platelet-rich plasma; polyribosyl ribitol phosp... |
| PRR | proton relaxation rate; pulse repetition rate |
| PSC | patient services coordination; Porter-Silber chromogen; posterior subcapsular cataract; primary scle... |