The thyroid gland is an endocrine gland located anterior to the trachea and inferior to the thyroid cartilage. It is butterfly shaped with three lobes that make it the largest endocrine organ in the body. Its primary function is to control the body’s metabolism by regulating how quickly the body uses energy, proteins, and hormones. The two lateral lobes are connected by the middle lobe called the isthmus, which lies directly on top of the trachea. The entire gland is enclosed in a...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.
- A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.