| PLM | percent labeled mitoses; periodic leg movement; plasma level monitoring; polarized light microscopy |
|---|---|
| PLR | pupillary light reflex |
| PLV | partial liquid ventilation; poliomyelitis live vaccine; panleukopenia virus; phenylalanine, lysine, ... |
| PMLE | polymorphous light eruption |
| QLS | Quality of Life Scale; quasielastic light-scattering spectroscopy |