| DEJ, dej | dentino-enamel junction; dermo-epidermal junction |
|---|---|
| QRS-ST | the junction between the QRS complex and the ST segment in the electrocardiogram [junction] |
| ARA | Academy of Rehabilitative Audiometry; acetylene reduction activity; American Rheumatism Association;... |
| ARD | absolute reaction of degeneration; acute radiation disease; acute respiratory disease; adult respira... |
| ARM | adrenergic receptor material; aerosol rebreathing method; ambulatory renal monitor; anorectal manome... |