Glossary of terms used on this site

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Term Definition
Tendon transfer

A procedure in which the tendon of a functioning muscle is mobilised, detached or divided and reinserted into a bony part or onto another tendon, to supplement or substitute for the action of the recipient tendon.


Tendons are tough, fibrous bands that connect muscles to bone.


Any agent that can disturb the development of an embryo or fetus and lead to a birth defect(s) or miscarriage. Important examples of teratogens include radiation, maternal infections, chemicals, and drugs.


Termination of pregnancy or abortion is the process to remove a fetus or embryo and end a pregnancy.


Testosterone is a sex hormone produced by the testes that encourages the development of male sexual characteristics, stimulates the activity of the male secondary sex characteristics, and prevents changes in them following castration. Chemically, testosterone is 17-beta-hydroxy-4-androstene-3-one.

Testosterone treatment

Testosterone is a hormone that promotes the development and maintenance of male sex characteristics.


The thyroid gland is found in the neck. It produces hormones that are released into the bloodstream to control the body's growth and metabolism. These hormones are called thyroxine and triiodothyronine. They affect processes such as heart rate and body temperature, and help convert food into energy to keep the body going.

Thyroid hormone

Thyroid hormone tablets can be taken to keep your thyroid levels normal. Hypothyroidism is treated with tablets called levothyroxine (often referred to as thyroxine). The aim is to cure the symptoms of hypothyroidism by replacing the lack of thyroid hormones in your blood.

Thyroid-stimulating hormone (TSH)

Thyroid-stimulating hormone (TSH) is made in the pituitary gland in your brain and controls the production of thyroxine and triiodothyronine. When the level of thyroxine and triiodothyronine in your blood are normal, your pituitary gland stops releasing TSH. When the level of thyroxine or triiodothyronine drops, the pituitary gland produces more TSH to boost the level.

Thyroid-stimulating hormone (TSH) test

This involves taking a sample of blood and testing it for levels of thyroid-stimulating hormone (TSH) and thyroxine and triiodothyronine (the thyroid hormones)


Surgery to remove some, or all, of the thyroid gland


Tinnitus is the medical name for the perception of noise in one ear, both ears or in the head. The noise comes from inside the body rather than an outside source. People with tinnitus can experience different types of sounds. Most people describe it as a ringing sound, but other sounds may include buzzing, humming, whistling and music.


Traction involves applying a pulling force to the limbs, soft tissues, pelvis or spine. It can either be used to stretch a single part of the body or to separate two individual parts of the body.


Any inherited (gene determined) characteristic.


The process by which genetic information is copied from the DNA in the chromosomes into messenger RNA

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