Definition

1. Noun:
   • An endocrine gland: The thyroid gland is a ductless gland of the endocrine system. It is located in the neck, near the base, and secretes hormones directly into the bloodstream.
   • A regulator of metabolism: This gland produces hormones, primarily thyroxine (T4) and triiodothyronine (T3), which are critical for regulating the body's metabolic rate, growth, and development.

Usage Examples

• Noun:
  • The doctor examined her thyroid gland for any abnormalities.
  • Iodine is an essential nutrient for the proper function of the thyroid gland.
  • An overactive thyroid gland can cause weight loss and anxiety.

Advanced Usage

• Medical Context: The term is frequently used in medical, biological, and health contexts to discuss anatomy, physiology, and disorders.
  • The scan revealed a nodule on her thyroid gland.
• Figurative Use: In rare, non-literal contexts, it can metaphorically represent a central control mechanism.
  • The central bank acts as the thyroid gland of the national economy, regulating its metabolic rate.

Variants and Related Words

• Thyroid (noun/adjective): Often used as a shorter form for "thyroid gland." As an adjective, it describes things related to the gland (e.g., thyroid hormone, thyroid cartilage).
  • She has a thyroid condition.
• Thyroidectomy (noun): The surgical removal of the thyroid gland.
• Hyperthyroidism (noun): A condition caused by an overactive thyroid gland.
• Hypothyroidism (noun): A condition caused by an underactive thyroid gland.

Synonyms

• Thyroid (when used as a noun to mean the gland itself).
• Endocrine gland (this is a broader category; the thyroid is a specific type of endocrine gland).

Related Phrases

• Thyroid function test: A blood test to check how well the thyroid gland is working.
• Thyroid-stimulating hormone (TSH): A hormone from the pituitary gland that controls the thyroid gland's activity.

Noun

1. located near the base of the neck