Glossary index
Medical terms beginning with T
Browse medical definitions and meanings in the complete glossary, or choose a letter to narrow the list.
242 medical terms in this glossary begin with the letter T, from T cell onward. Every entry gives a plain-language definition, and most add a pronunciation, the word parts it is built from, and related terms.
This is also the place to look for medical words, health words, anatomy terms and disease names starting with T.
T terms
242 results-
A T cell is an immune cell, matured in the thymus, that attacks infected or abnormal cells or helps direct the immune response.
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White cells schooled in a gland behind the breastbone, and the reason a transplanted organ is recognized as belonging to somebody else.
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The immune system's own restraint, written in shorthand: a cell whose entire purpose is stopping other cells from going too far.
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A t test is a statistical method that determines whether an observed difference between the average values of two groups likely reflects a real effect.
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A thyroid hormone.
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An aggressive (fast-growing) type of leukemia (blood cancer) in which too many T-cell lymphoblasts (immature white blood cells) are found in the bone marrow and blood.
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Treatment to destroy T cells, which play an important role in the immune response.
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A type of leukemia in which large T lymphocytes (a type of white blood cell) that contain granules (small particles) are found in the blood.
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A group of lymph system cancers arising from the immune cells that direct and carry out attacks rather than make antibodies.
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A type of leukemia in which large T lymphocytes (a type of white blood cell) that contain granules (small particles) are found in the blood.
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A type of non-Hodgkin lymphoma in which too many T-cell lymphoblasts (immature white blood cells) are found in the lymph nodes and spleen.
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A word-order variant of the same name, describing the cell that decides when an immune response has gone on long enough.
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An anticancer drug that belongs to the family of drugs called mitotic inhibitors.
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A substance that is being studied in the treatment of cancer.
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Three chemotherapy drugs given together for breast cancer, the letters taken from their older trade names.
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An abbreviation for a chemotherapy combination used with other types of therapy to treat breast cancer.
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A substance that is being studied in the treatment of cancer.
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A fast heart is usually the body responding correctly to something else, and the real question is what that something else is.
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tachypnea
/ TA-kip-NEE-uh /Tachypnea is a breathing rate that is abnormally high for a person’s age and clinical circumstances.
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Tacrolimus suppresses the immune system by blocking a step in T cell activation, and is used mainly to prevent rejection after organ transplantation.
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Its long duration sets it apart from others in its class, and it is the one also used for urinary symptoms of an enlarged prostate.
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A protein/sugar complex found on the surface of many cancer cells, including breast, colon, and pancreatic cells.
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Constant transfer of weight through a slow sequence trains balance in a way that seated exercise and straight-line walking do not.
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The small bone at the bottom of the spine.
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The use of communication, drugs, or other types of treatments that are specific for an individual or a group to improve health or change behavior.
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A substance being studied in the treatment of cancer, including certain types of lung, pancreas, and brain cancer.
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A substance being studied in the treatment of cancer, including certain types of lung, pancreas, and brain cancer.
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Talactoferrin is a laboratory made version of human lactoferrin studied as an investigational treatment, without established approved use.
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A drug being studied in the treatment of kidney cancer that has spread.
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A substance that is being studied in the treatment of brain tumors and other brain disorders, such as epilepsy and Parkinson disease.
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A drug used in photodynamic therapy.
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A soft mineral with two unrelated medical stories: one about sealing a chest cavity shut, the other about what else the rock contains.
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Treatment of mental, emotional, personality, and behavioral disorders using methods such as discussion, listening, and counseling.
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A substance that is being studied in the treatment of leukemia and some other types of cancer.
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Timing dominates this one: it stops new virus particles escaping infected cells, so it does most good early, before the infection has peaked.
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Selective is the operative word, since the same drug blocks estrogen in breast tissue while imitating it in bone and the uterus.
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A tablet that blocks estrogen in breast tissue while imitating it elsewhere, which explains both its benefits and its risks.
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Relief arrives in days rather than months, because the drug changes muscle tone instead of shrinking the gland causing the obstruction.
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It does not shrink the prostate at all; it slackens the muscle wrapped around the outlet, so any relief arrives within days.
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A substance being studied in the treatment of some types of cancer.
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A substance being studied in the treatment of cancer.
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A drug used to treat certain types of non-small cell lung cancer.
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Treatment aimed at a single molecule a disease leans on, rather than at every fast-dividing cell in the body.
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A drug used to treat skin problems caused by cutaneous T-cell lymphoma that have not gotten better after other treatment.
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A substance that is being studied in the treatment of cancer.
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Tasigna targets the specific abnormal protein responsible for driving cell growth in a genetically defined form of chronic leukemia.
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A substance that is being studied in the treatment of cancer.
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Yew-derived chemotherapy that freezes the cell's internal scaffolding solid, which is the opposite of what the other scaffolding drugs do.
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A drug used with prednisone to treat hormone-resistant prostate cancer that has spread and that had been treated with docetaxel.
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Taxol is the brand name for paclitaxel, a chemotherapy drug that stops cancer cells from dividing by disrupting their internal skeleton.
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A brand of docetaxel, a chemotherapy drug that works by freezing the internal scaffolding a cell needs in order to divide.
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Tazarotene is a topical retinoid medication used primarily to treat psoriasis and acne by normalizing skin cell growth and turnover.
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A laboratory-made cousin of vitamin A whose established job is calming psoriasis and acne, not the cancer uses it is sometimes listed under.
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Infection and disease are not the same thing here, and most people who carry the bacteria never become ill or infectious.
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An Australian shrub with no relation to tea, whose oil is applied to skin and poisons children who swallow it.
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A radiolabeled substance that is used to help identify sites of tumor development.
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The word is loose in everyday speech, and several roles it gets applied to carry a formal title of technologist, reflecting longer training.
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An anticancer drug that belongs to the family of drugs called antimetabolites.
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A substance being studied in the treatment of some types of cancer.
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A substance used to treat bacterial infections.
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Tiny surface vessels stretched permanently wide, visible as red threads that fade under pressure and refill the moment it lifts.
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A substance that is being studied in the treatment of cancer.
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Distance stops being the obstacle, but a physical examination does not travel down a video link, so some visits cannot be replaced.
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The enzyme that rebuilds chromosome ends, switched off in most adult tissue and switched back on in the great majority of cancers.
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Telomeres are protective caps of repetitive DNA at chromosome ends that shorten with each cell division, limiting how many times a cell can divide.
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The brand name for temozolomide, one of the few chemotherapy drugs that reaches brain tissue in useful amounts.
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An anticancer drug that is also used in cancer prevention.
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An oral chemotherapy that reaches brain tissue unaided, which is why it anchors treatment of the most aggressive brain tumors.
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A drug used to treat advanced renal cell carcinoma (a type of kidney cancer).
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Tendons are tough fibrous cords that transmit a muscle's pulling force to bone, distinct from ligaments that connect bone to bone.
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Tissue from painful tendons usually shows disorganized collagen rather than inflammatory cells, which is why tendinopathy has largely replaced the name.
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An anticancer drug that is a podophyllotoxin derivative and belongs to the family of drugs called mitotic inhibitors.
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A procedure in which mild electric currents are applied to some areas of the skin.
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A type of germ cell cancer that usually forms in the testes (testicles).
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Its tissues are recognizable and in the wrong place, and whether that tissue is fully formed matters less in the testis than in the ovary.
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An alpha blocker that relaxes the muscle collar around the bladder outlet, easing urine flow within days rather than months.
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A drug used to treat urinary problems caused by an enlarged prostate.
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A terminal disease has progressed beyond the possibility of cure, shifting the aim of care toward comfort rather than reversing the underlying condition.
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A repeating five carbon unit builds all of them, which is why pine, citrus peel and lavender share one family of scent compounds.
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Sperm production needs a temperature the abdomen cannot provide, which is why these glands hang outside the body in a thin skinned pouch.
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Testicular cancer is a cancer of the testis that most often affects younger and middle-aged men and includes two main tumor types.
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A cord-like structure in the male reproductive system that contains nerves, blood and lymph vessels, and the vas deferens (a coiled tube that carries sperm out of the testicle).
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A testimonial is a personal account claiming benefit from a product, offered without the controlled evidence needed to confirm the claim scientifically.
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The formal name for the male gonad, used in anatomy and reports, where the plural testes and the adjective testicular both appear constantly.
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A hormone made mainly in the testes (part of the male reproductive system).
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A substance that is derived from the toxin released by the bacterium that causes the disease tetanus.
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A device used to look at tissues in the esophagus.
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A substance being studied in the treatment of cancer.
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One quirk explains both its research use and its drawback: the drug locks on to calcium wherever bone and teeth are forming.
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A substance being studied in the treatment of leukemias and lymphomas.
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A substance that makes tumor cells more sensitive to radiation therapy and is being studied in the treatment of cancer.
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A substance that is being studied as an anticancer drug.
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Less a relay station than a gatekeeper, since it decides which signals reach awareness and which are damped down before arriving.
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A sedative withdrawn after causing catastrophic birth defects, later brought back under strict control for myeloma and leprosy reactions.
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A drug that is used to treat multiple myeloma in patients who have just been diagnosed, and a painful skin disease related to leprosy.
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The gap between a helpful amount and a harmful one is narrow, which is why blood levels are checked during treatment.
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A monoclonal antibody being studied in the treatment of some types of cancer.
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The label marks intent rather than outcome, so a therapeutic dose is one aimed at benefit, not one guaranteed to deliver it.
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A hand-hovering practice performed mostly without contact, resting on an energy field that testing has repeatedly failed to detect.
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One of the least specific words in medicine, it marks that treatment is happening while the word in front of it carries the detail.