| PHF | paired helical filament; personal hygiene facility |
|---|---|
| PHOX | paired mesoderm homeobox [gene] |
| PMX | paired mesoderm homeobox [gene] |
| PS | pacemaker syndrome; paired stimulation; paradoxical sleep; paraspinal; parasympathetic; Parkinson sy... |
| THB | thrombocyte B; Todd-Hewitt broth; total heart beats |