| TCNV | terminal contingent negative variation |
|---|---|
| TD | tabes dorsalis; tardive dyskinesia; T-cell dependent; temporary disability; terminal device; tetanus... |
| TDLU | terminal ductal lobular unit |
| TDT | terminal deoxynucleotidyltransferase; thermal death time; tone decay test; tumor doubling time |
| TdT | terminal deoxynucleotidyl transferase |