| NAF | nafcillin; National Amputation Foundation; National Ataxia Foundation; net acid flux |
|---|---|
| f | Greek letter phi; magnetic flux; osmotic coefficient |
| RS | radioscaphoid; random sample; rating schedule; Raynaud syndrome; recipient's serum; rectal sinus; re... |
| TR | recovery time; rectal temperature; repetition time; residual tuberculin; terminal repeat; tetrazoliu... |
| TRH | tension-reducing hypothesis; thyrotropin-releasing hormone |