| T3 only | Examples of T3-only thyroid hormone replacements include: Cytomel or Tertroxin. |
| T4 | See Thyroxin. |
| T4 only | Examples of T4-only thyroid hormone replacements include: Synthroid, Thyroxine, Eltroxin , Levoxyl, Unithroid or Levothyroxine. |
| Tablespoon | |
| Tablespoons | See Tablespoon. |
| Tachycardia | |
| Tachyphylaxis | Progressive decrease in response following repetitive administration of a pharmacologically or physiologically active substance. |
| Taurine | |
| tbsp | See Tablespoon. |
| T-Cell | |
| T-Cells | See T-Cell. |
| Teaspoon | Equivalent to 5cc (5ml). |
| Teaspoons | See Teaspoon. |
| Telangiectasia | |
| Tempero-Mandibular Joint | |
| Tendonitis | |
| Tendovaginitis | Inflammation of a tendon and its sheath. |
| Tenesmus | |
| Tension Headache | |
| Tension Headaches | See Tension Headache. |
| Teratogen | |
| Teratogenic | |
| Teratogenicity | |
| Teratogens | See Teratogen. |
| Testicle | See Testicles. |
| Testicles | |
| Testicular | See Testicles. |
| Testosterone | |
| Tetany | |
| TH1 | See Cytokines. |
| TH2 | See Cytokines. |
| Thalassemia | |
| Thiamin | See Thiamine. |
| Thiamine | |
| Thiazide | |
| Thoracic Duct | |
| Threadworm | See Pinworms. |
| Threonine | An essential amino acid needed for proper growth in infants and maintenance of nitrogen balance in adults. |
| Thrombasthenia | Platelet defect with impaired ability to form blood clots. |
| Thrombocyte | Platelet. |
| Thrombocytopenia | |
| Thrombophlebitis | |
| Thrombosis | |
| Thrush | |
| Thymoma | |
| Thymus | |
| Thymus Gland | See Thymus. |
| Thyroglobulin | The iodine-containing protein that is stored in the thyroid gland. It is converted into circulating thyroxines when the thyroid is
stimulated by TSH (Thyroid Stimulating Hormone) from the pituitary (in turn stimulated by the hypothalamus, where thyroxine levels are actually monitored). See also T4. |
| Thyroid | |
| Thyroid Gland | See Thyroid. |
| Thyroiditis | |
| Thyrotoxicosis | |
| Thyroxin | |
| Tic Douloureux | See Trigeminal Neuralgia. |
| TID | Three times a day. |
| Tincture | An alcohol or water-alcohol solution, usually referring to a preparation from herbal materials. |
| Tinea Pedis | See Tineas. |
| Tinea Versicolor | See Tineas. |
| Tineas | |
| Tinnitis | See Tinnitus. |
| Tinnitus | |
| T-Lymphocyte | |
| T-Lymphocytes | See T-Lymphocyte. |
| TMD | Tempero-mandibular joint dysfunction. |
| TMG | See Tri-Methyl-Glycine. |
| TMJ | See Tempero-Mandibular Joint. |
| TNF | Tumor Necrosis Factor. |
| Tocopherol | |
| Tocopherols | See Tocopherol. |
| Tocotrienol | |
| Tonic-Clonic | |
| Topical | |
| Toxemia Of Pregnancy | See Preeclampsia. |
| TPN | Total Parenteral Nutrition: Can provide all or most of a patient's nutrient requirements by intravenous means. |
| Trace Element | |
| Trace Elements | See Trace element. |
| Trace Mineral | See Trace element. |
| Trace Minerals | See Trace element. |
| Trachea | |
| Tracheobronchitis | |
| Transfer Factor | |
| Trichinella spiralis | See Trichinosis. |
| Trichinellosis | See Trichinosis. |
| Trichinosis | |
| Trichomonas | |
| Trichomoniasis | |
| Trichuriasis | See Whipworm. |
| Trichuris trichiura | See Whipworm. |
| Trigeminal Neuralgia | |
| Triglyceride | |
| Triglycerides | See Triglyceride. |
| Tri-Methyl-Glycine | |
| Tropical | See Tropics. |
| Tropics | The region of the earth's surface lying between 23°27 North of the equator and 23°27 South of the equator. |
| Trypsin | See Chymotrypsin. |
| Tryptophan | |
| tsp | See Teaspoon. |
| Tubal Pregnancies | See Ectopic Pregnancy. |
| Tubal Pregnancy | See Ectopic Pregnancy. |
| Tuberculosis | |
| Tumor | |
| Tumors | See Tumor. |
| Tumour | See Tumor. |
| Tumours | See Tumor. |
| Tyramine | |
| Tyrosine | |
