| AAPPO | American Association of Preferred Provider Organizations |
|---|---|
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| PPA | palpation, percussion, auscultation; pepsin A; phenylpropanolamine; phenylpyruvic acid; Pittsburgh p... |
| prefd | preferred |
| PSIL | preferred frequency speech interference level |