Definition for Thyroid Gland
From Biology Forums Dictionary
The thyroid gland, the largest of the endocrine glands, is located in the neck just below the thyroid cartilage of the larynx. It consists of two lobes, one on either side of the trachea, joined by a narrow band or isthmus. It is composed of numerous hollow ball-shaped follicles with small, interspersed clusters of parafollicular cells.