| TET | tetracycline; total ejection time; total exchange thyroxine; treadmill exercise test |
|---|---|
| TF | free thyroxine; tactile fremitus; tail flick [reflex]; temperature factor; testicular feminization; ... |
| T4N | normal serum thyroxine |
| T4RIA, | T4(RIA) thyroxine radioimmunoassay |
| T4SA | thyroxine-specific activity |