| PT | pain threshold; parathormone; parathyroid; paroxysmal tachycardia; part time; patient; pericardial t... |
|---|---|
| RTU | real-time ultrasonography; relative time unit; renal transplantation unit |
| SRT | sedimentation rate test; simple reaction time; sinus node recovery time; sitting root test; speech r... |
| tcTOFA | time constrained time-of-flight absorbance |
| TD | the time required to double the number of cells in a given population; thermal death time |