| MPPN | malignant persistent positional nystagmus |
|---|---|
| PAN | periarteritis nodosa; periodic alternating nystagmus; peroxyacylnitrate; polyarteritis nodosa; posit... |
| PN | papillary necrosis; parenteral nutrition; penicillin; perceived noise; percussion note; periarteriti... |
| 'Greek letter alpha' | angular acceleration; first [carbon atom next to the carbon atom bearing the active group in organic... |
| beta [Greek letter beta] | an anomer of a carbohydrate; buffer capacity; carbon separated from a carboxyl by one other carbon i... |