| DRR | digitally reconstructed radiograph; Division of Research Resources [NIH]; dorsal root reflex |
|---|---|
| DTR | deep tendon reflex; dietetic technician registered |
| HJR | hepatojugular reflex |
| IAR | immediate asthma reaction; inhibitory anal reflex; iodine-azide reaction |
| LOR | long open reading frame; lorazepam; loricrin; loss of righting reflex |