| RBD | recurrent brief depression; relative biological dose; right border of dullness |
|---|---|
| RCD | relative cardiac dullness |
| RHD | radiological health data; relative hepatic dullness; renal hypertensive disease; rheumatic heart dis... |
| RMD | retromanubrial dullness |
| SMD | senile macular degeneration; spondylometaphyseal dysplasia; submanubrial dullness |