| qd | every day [Lat. quaque die] |
|---|---|
| qds | to be taken four times a day [Lat. quater die sumendum] |
| qod | every other day [Lat. quaque altera die] |
| qqd | every day [Lat. quoque die] |
| RD | radial deviation; radiology department; rate difference; Raynaud disease; reaction of degeneration; ... |