Medical Dictionary Terms Beginning with T

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T (thymine)

T (thymine): T stands for thymine, one member of the A-T (adenine-thymine) base pair in DNA. The other base pair in DNA is G-C (guanine- cytosine).
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t.i.d.

t.i.d.: Seen on a prescription, t.i.d. means three times a day. It is an abbreviation for "ter in die" which in Latin means three times a day. The abbreviation t.i.d. is sometimes written without a period either in lower-case letters as "tid" or
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Tablespoon

Tablespoon: An old-fashionned but convenient household measure of capacity. A tablespoon holds about 5 cc. A tablespoon = 3 teaspoons.
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Tache noire

Tache noire: Black spot (in French), a small ulcer covered with a black crust at the site of a tick bite, characteristic of several tick-borne rickettsial diseases.
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Tachycardia

Tachycardia: A rapid heart rate, usually defined as greater than 100 beats per minute.
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Tachycardia, paroxysmal atrial (PAT)

Tachycardia, paroxysmal atrial (PAT): Bouts of rapid, regular heart beating originating in the atrium (upper chamber of the heart). Often due to abnormalities in the AV node &relay station& that lead to rapid firing of electrical impulses fro
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Tachycardia, sinus

Tachycardia, sinus: Fast heartbeat (tachycardia) occurring because of rapid firing by the SA node, the natural pacemaker of the heart. Electrical signals initiated in the SA node are transmitted to the atria and the ventricles to stimulate heart muscle
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Tachycardia, ventricular

Tachycardia, ventricular: An abnormal heart rhythm that is rapid, regular and originates from an area of the ventricle, the lower chamber of the heart. Ventricular tachycardias are life threatening arrhythmias most commonly associated with heart attack
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Tachypnea

Tachypnea: Abnormally fast breathing.
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Tactile

Tactile: Having to do with touch.
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Taenia

Taenia: In medicine, taenia is a genus (group) of large tapeworms some of which are parasitic in humans. In anatomy, taenia refers to a band or a structural line and applies to several bands and lines of nervous matter in the brain. In Latin, tae
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Taenia saginata

Taenia saginata: The beef tapeworm. The most common of the big tapeworms that parasitizes people, contracted from infected raw or rare beef. Can grow to be 12-25 feet (3.6-7.5 m) long in the human intestine. Also known as the African tapeworm.
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Taenia solium

Taenia solium: The pork tapeworm. Contracted from undercooked or measly pork (pork infected with the larval forms of the tapeworm). Can grow to be 3-6 feet (0.9-1.8 m) long in the human intestine. Also known as the armed tapeworm and the measly tapeworm
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Tag, ear

Tag, ear: Common minor anomaly, a rudimentary tag of ear tissue, often containing a core cartilage, usually located just in front of the ear (auricle). Therefore, also called preauricular tag. The presence of 2 or more minor anomalies in a child increa
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Tag, preauricular

Preauricular tag: A common minor anomaly, this is a rudimentary tag of ear tissue. It often contains a core of cartilage. The tag is typically located just in front of the ear (auricle) and is therefore called a preauricular tag.
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Tag, skin

Tag, skin: A small tag of skin that may have a stalk (a peduncle). Skin tags may appear on the skin almost anywhere although the favorite locales are the eyelids, neck, armpits (axillae), upper chest, and groin. Invariably benign, this tiny tumor of t
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Talipes

Talipes: Clubfoot. The Latin word talipes was compounded from talus (ankle) + pes (foot) since, with the common (&classic&) type of clubfoot (talipes equinovarus), the foot is turned in sharply and the person seems to be walking on their ankl
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Talipes equinovarus

Talipes equinovarus: The common (&classic&) form of clubfoot. Talipes is made up of the Latin talus (ankle) + pes (foot). Equino- indicates the heel is elevated (like a horse’s) and -varus indicates it is turned inward. With this type of
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Talus

Talus: The ankle bone. The ankle joint is formed by the talus and the bottom of the tibia and fibula that rest upon it. The Latin word "talus" means ankle and in medicine it can refer to the entire ankle, too.
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Tampon

Tampon: A tampon is a pack or pad used to plug, to stanch, to stop the flow of blood or other fluids. The tampon may be made of cotton, sponge, or another material. Tampons serve in surgery to control bleeding. Likewise, with nosebleeds. Vaginal
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