| PTB | patellar tendon bearing; prior to birth |
|---|---|
| PTR | patellar tendon reflex; patient termination record; patient to return; peripheral total resistance; ... |
| IAC | image analysis cytometry; ineffective airway clearance; internal auditory canal; interposed abdomina... |
| PaO2 | partial oxygen tension in arterial blood; partial pressure of oxygen in arterial blood |
| SAP | sensory action potential; serum acid phosphatase; serum alkaline phosphatase; serum amyloid P; situs... |