Thyroid (noun)

1. A gland in the neck that produces hormones that regulate the body's metabolism and growth, and that stores iodine.
2. The thyroid gland located at the base of the neck, which produces hormones that regulate the metabolism and growth of the body.

Origin:

Derived from the greek word "thyreoeides" meaning "shield-shaped".

Examples:

1. She was diagnosed with a thyroid disorder.
2. The thyroid gland is responsible for regulating the body's metabolism.
3. An overactive thyroid can cause weight loss and rapid heartbeat.
4. An underactive thyroid can cause weight gain and fatigue.
5. The thyroid hormones are important for growth and development.