| A | B |
|---|
| O2 | Oxygen |
| OCG | Oral cholecystogram |
| OD | Right Eye |
| OS | Left Eye |
| OU | Both Eyes |
| OOB | Out Of Bed |
| ORE | Oil retention enema |
| oz | Ounce |
| OR | Operating Room |
| Ortho | Orthopedics |
| OT | Occupational Therapy |
| -oid | Resembling |
| -ologist | Specialist |
| -ology | Study of |
| -oma | Tumor |
| oophor/o | Ovary |
| opthalm/o | Eye |
| orchi/o | Testicle |
| orchid/o | Testicle |
| -orrhagia | Rapid Discharge |
| -orrhea | Discharge |
| -osis | Abnormal Condition |
| oste/o | Bone |
| ot/o | Ear |
| -otomy | Surgical incision |
| p | after |
| PACU | Post Anesthesia Care Unit |
| PAP | Prostatic acid phosphotase |
| pc | after meals |
| PCA | Patient controlled analgesia |
| PCN | Penicillian |
| PCXR | Portable chest x-ray |
| PICC | Peripherally inserted central cathater |
| PID | Pelvic Inflammatory disease |
| PAS | Pulsatile antiembolism stockings |
| po | By mouth |
| pp | Per Prandial <after meals> |
| pr | Per Rectum |
| prn | As needed |
| PSA | Prostatic specified antigen |
| PT | Patient |
| PT | Physical Therapy |
| PT | Prothrombin time |
| PTT | Partial thromboplastin time |
| pancreat/o | Pancreas |
| parathyroid/o | Parathyroid |
| patell/o | Patella |
| path/o | Disease |
| peri- | Around |
| perine/o | Perineum |
| -pexy | Surgical Incision |
| phalang/o | Phalanges |
| pharyng/o | Pharynx |
| phleb/o | Vein |
| -phobia | Fear |
| -plasty | Plastic <Surgical> Repair |
| pleur/o | Pleura |
| -pnea | Breathing, respirations |
| pneum/o | Lung, Air |
| pneumon/o | Lung |
| proct/o | Rectum |
| prostat/o | Prostate |
| pulmon/o | Lung |
| psych/o | Mind |
| pyel/o | Renal pelvis |
