| RDI | recommended daily intake; respiratory disturbance index; rupture-delivery interval |
|---|---|
| SAVD | spontaneous assisted vaginal delivery |
| SD | Sandhoff disease; senile dementia; septal defect; serologically defined; serologically detectable; s... |
| TND | term normal delivery |
| UD | ulcerative dermatosis; ulnar deviation; undetermined; underdeveloped; unit dose; urethral dilatation... |