| PLL | peripheral light loss; phase-locked loop; poly-L-lysine; pressure length loop; posterior longitudina... |
|---|---|
| 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 |