| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |
|---|---|
| L/S | lactase/sucrase [ratio]; lecithin/ sphingomyelin [ratio]; lipid/saccharide [ratio]; longitudinal sec... |
| DIPI | defective interfering particle induction |
| FID | flame ionization detector; free induction decay; fungal immunodiffusion |
| FIS | forced inspiratory spirogram; free induction signal |