| Abbreviation | Meaning |
| T | Thoracic Vertebrae Testosterone |
| Tx | Treatment |
| T3 | Triiodothyronine |
| T4 | Thyroxine |
| TA | temporal arteritis |
| T&A | tonsillectomy with adenoidectomy |
| T&C | type and cross-match (see blood transfusion) |
| T&S | type and screen (blood; e.g., to prepare for blood transfusion) |
| Tab | Tablet (pharmacy) |
| TAB | Therapeutic abortion Threatened abortion |
| TAH | total abdominal hysterectomy |
| TAH-BSO | total abdominal hysterectomy with bilateral salpingo-oophorectomy |
| TAP | trypsinogen activation peptide |
| TAPVR | total anomalous pulmonary venous return |
| TAT | thematic apperception test |
| TAVI | transcatheter aortic valve implantation |
| TAVR | transcatheter aortic valve replacement |
| TB | tuberculosis |
| TBC | tuberculosis
total body crunch |
| TbEC | Enteric coated tablet |
| TBG | thyroid-binding globulin |
| TBI | to be intubated
total body irradiation
traumatic brain injury |
| TBLC | term birth living child |
| TBSA | Total body surface area |
| TBW | Tension band wiring/wire |
| TC | traffic crash |
| TCA TCA | tricyclic antidepressants trichloroacetic acid |
| TCC | transitional cell carcinoma |
| TCM | traditional Chinese medicine |
| TCN | tetracycline |
| TCOM | Transcutaneous oxygen measurement |
| TCP | Thrombocytopenia |
| TCT | thrombin clotting time |
| T2DM | type 2 Diabetes mellitus |
| Td | tetanus and diphtheria (combined vaccination) |
| TD | Transdermal |
| TDaP | tetanus, diphtheria, and acellular pertussis combined vaccine |
| TdP | Torsades de pointes |
| TDD | Total daily dose |
| TDM | Therapeutic Drug Monitoring |
| TDS | three times a day (from Latin ter die sumendus) |
| TdT | terminal deoxynucleotidyl transferase |
| TD | Tardive dyskinesia |
| TE | tracheoesophageal Or Toxoplasmic Encephalitis |
| TEB | thoracic electrical bioimpedance (see impedance cardiography) |
| TEC | transient erythroblastopenia of childhood |
| TEE | transesophageal echocardiogram |
| TEF | tracheoesophageal fistula |
| TEM | transmission electron microscopy |
| Temp | temperature |
| TEN | toxic epidermal necrolysis |
| TENS | transcutaneous electrical nerve stimulator |
| TF | transfer |
| T/F | transfer |
| TFR | tumor volume to fetal weight ratio |
| TFTs | thyroid function tests |
| TGA | transposition of the great arteries |
| TG | triglycerides |
| TGL | triglycerides |
| Tg | thyroglobulin |
| TGF | tumor growth factor |
| TGV | transposition of the great vessels |
| T&H | type and hold (stay ready for blood transfusion) |
| THR | total hip replacement |
| TI | terminal ileum |
| TIA | transient ischemic attack |
| TIBC | total iron-binding capacity |
| Tib-Fib | tibia and fibula |
| TID | three times a day (from Latin ter in die) |
| TIN | tubulointerstitial nephritis |
| TIPS | transjugular intrahepatic portosystemic shunt |
| TKA | total knee arthoplasty |
| TKO | to keep (vein) open for IV therapy |
| TKR | total knee replacement |
| TKVO | to keep vein open |
| TLA | three letter acronym |
| TLC | total lung capacity, or total lymphocyte count |
| TLE | temporal lobe epilepsy |
| TLH | total laparoscopic hysterectomy |
| TLR | tonic labyrinthine reflex |
| TLS | tumor lysis syndrome |
| TM | tympanic membrane |
| TMA | thrombotic microangiopathy |
| TMB | tumor mutational burden |
| TME | toxic metabolic encephalopathy |
| TME | total mesorectal excision |
| TMC | toxic megacolon |
| TMJ | temporomandibular joint |
| TNF | tumor necrosis factor |
| TNG | trinitroglycerin |
| TNM | tumor-nodes-metastases |
| TNTC | too numerous to count |
| TOA | tuboovarian abscess |
| TOC | test-of-cure (+TOC meaning patient cured of disease proven via test) |
| TOC | Transition of care |
| TOD | transoesophageal Doppler |
| TOE | transoesophageal echocardiogram |
| TOF | tetralogy of Fallot |
| TOP | termination of pregnancy |
| TOT | transobturator tape |
| TP | total protein |
| TPa | tissue plasminogen activator |
| TPN | total parenteral nutrition |
| TPR | temperature, pulse, respiration |
| TPR | total peripheral resistance |
| TR | tricuspid regurgitation |
| Tr | tincture |
| TRAM | transverse rectus abdominis myocutaneous flap (TRAM flap) |
| TRAP | tartrate-resistant acid phosphatase |
| T2RF | type 2 respiratory failure |
| TRF | transfer (pronounced "turf") |
| TRF'd | transferred (pronounced "turfed", as in "We just turfed Mrs Johnson OTD") |
| TRH | thyrotropin-releasing hormone |
| TRT | testosterone replacement therapy |
| TRUSP | Transrectal Ultrasonography of the Prostate
Transrectal Ultrasound of the Prostate |
| TS | tricuspid stenosis |
| Tsp | teaspoon (5 mL) |
| TSH | thyroid stimulating hormone |
| TSH | Thoughts of self-harm |
| TSHR-Ab | thyrotropin-receptor antibody |
| TSI | Thyroid Stimulating Immunoglobulin |
| T.S.T.H. | too sick to send home |
| TT | Thrombin Time Tubes Tied |
| TTE | transthoracic echocardiogram |
| TTG | tissue transglutaminase |
| TTN | transient tachypnea of the newborn |
| TTO | to take out (medicines given to patient on discharge from hospital stay) |
| TTP | thrombotic thrombocytopenic purpura
tender to palpation |
| TTR | transthyretin |
| TTS | transdermal therapeutic system |
| TTTS | twin-to-twin transfusion syndrome |
| Tu | tumor |
| TUBA | Trans-umbilical breast augmentation |
| TUIP | Transurethral incision of the prostate |
| TUMT | Transurethral microwave thermotherapy |
| TUNA | Transurethral needle ablation of the prostate |
| TUR | transurethral resection |
| TURBT | transurethral resection of bladder tumor |
| TURP | transurethral resection of the prostate |
| TV | Tricuspid valve; as in "TV repair" |
| TVC | true vocal cord |
| TVH | transvaginal hysterectomy |
| TVT | tension-free vaginal tape |
| TWOC | Trial without catheter |
| Tx | therapy
transplant
treatment |
| TXA | Tranexamic acid |
| TZD | Thiazolidinediones |
