| PNA | Paris Nomina Anatomica; peanut agglutinin; pentosenucleic acid |
|---|---|
| POP | diphosphate group; pain on palpation; paroxypropione; persistent occipitoposterior [fetal position];... |
| PP | diphosphate group; emphysema [pink puffers]; near point of accommodation [Lat. punctum proximum]; pa... |
| ROP | removal of pins or plates; removal of plaster [of Paris]; retinopathy of prematurity; right occipito... |