| 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... |
| A/G ratio | Albumin/Globulin ratio; 알부민대 글로불린의 비율 |
| S/D ratio | Systolic / Diastolic ratio |
| C/N | carbon/nitrogen [ratio]; carrier/ noise [ratio] |