• (gland, thyroid) Endocrine gland(s) adjacent to the trachea in mammals that produce thyroxine and other hormones.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• (thyroid, nos) An area of the thyroid gland not otherwise specified.
  NCI
  U.S. National Cancer Institute, 2021
• A gland located beneath the larynx (voice box) that makes thyroid hormone and calcitonin. The thyroid gland helps regulate growth and metabolism.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• A highly vascularized endocrine gland consisting of two lobes joined by a thin band of tissue with one lobe on each side of the TRACHEA. It secretes THYROID HORMONES from the follicular cells and CALCITONIN from the parafollicular cells thereby regulating METABOLISM and CALCIUM level in blood, respectively.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• A two-lobed gland located in the front of the neck below the larynx (voice box). It secretes hormones that help regulate the body's metabolism and calcium balance.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• An endocrine gland located at the base of the neck that produces and secretes thyroxine and other hormones. Thyroxine is important for metabolic control.
  NCI
  U.S. National Cancer Institute, 2021
• Endocrine gland normally situated in the lower part of the front of the neck; secretes, stores and releases the iodine dependent thyroid hormones thyroxine and triiodothyroine which play major endocrine roles in regulating metabolic rate; also secretes thyrocalcitonin.
  CRISP Thesaurus
  National Institutes of Health, 2006
• Lobular organ the parenchyma of which consists of ductless, glandular follicles filled with colloid. Examples: thyroid gland proper, accessory thyroid gland, lingual thyroid gland.
  Foundational Model of Anatomy
  University of Washington, 2017
• The thyroid is a small gland, measuring about 2 inches (5 centimeters) across, that lies just under the skin below the Adam�s apple in the neck. The two halves (lobes) of the gland are connected in the middle (called the isthmus), giving the thyroid gland the shape of a bow tie. Normally, the thyroid gland cannot be seen and can barely...
  Merck Manuals
  Merck & Co., Inc., 2025
• The thyroid is a highly vascular, brownish-red gland located anteriorly in the lower neck, extending from the level of the fifth cervical vertebra down to the first thoracic. The gland varies from an H to a U shape and is formed by 2 elongated lateral lobes with superior and inferior poles connected by a median isthmus, with an average...
  Medscape
  WebMD, 2025
• Thyroid gland, endocrine gland that is located in the anterior part of the lower neck, below the larynx (voice box). The thyroid secretes hormones vital to metabolism and growth. Any enlargement of the thyroid, regardless of cause, is called a goitre. The thyroid arises from a downward outpouching...
  Encyclopedia Britannica
  Encyclopedia Britannica, Inc., 2025