| FID | flame ionization detector; free induction decay; fungal immunodiffusion |
|---|---|
| FPD | feto-pelvic disproportion; flame photometric detector |
| MFID | multielectrode flame ionization detector |
| NPD | narcissistic personality disorder; natriuretic plasma dialysate; negative pressure device; Niemann-P... |
| PID | pain intensity difference [score]; pelvic inflammatory disease; photoionization detector; picture im... |