| qqd | every day [Lat. quoque die] |
|---|---|
| RD | radial deviation; radiology department; rate difference; Raynaud disease; reaction of degeneration; ... |
| SDS | same day surgery; school dental services; self-rating depression scale; sensory deprivation syndrome... |
| tds | to be taken three times a day [Lat. ter die sumendum] |
| tid | three times a day [Lat. ter in die] |