| qds | to be taken four times a day [Lat. quater die sumendum] |
|---|---|
| qid | four times daily [Lat. quater in die] |
| quadrupl | four times as much [Lat. quadruplicato] |
| TD | tabes dorsalis; tardive dyskinesia; T-cell dependent; temporary disability; terminal device; tetanus... |
| td | three times daily [Lat. ter die] |