Definition

Noun: A hormone produced and secreted by the anterior pituitary gland. Its primary function is to stimulate the thyroid gland to produce and release its own hormones, thyroxine (T4) and triiodothyronine (T3). It is a key regulator in the endocrine system's feedback loop controlling metabolism, growth, and development.

Usage

This term is used in medical, biological, and endocrinological contexts to refer to the specific hormone that acts on the thyroid gland. - It is often discussed in relation to thyroid function tests (e.g., TSH test). - It is central to understanding disorders like hypothyroidism (high TSH) and hyperthyroidism (low TSH).

Examples

• The doctor ordered a blood test to measure her thyroid-stimulating hormone level.
• Thyroid-stimulating hormone secretion increases when the body needs more thyroid hormones.
• A malfunction in the pituitary gland can lead to inadequate production of thyroid-stimulating hormone.

Advanced Usage

• "TSH": This is the universal acronym and the most common way to refer to thyroid-stimulating hormone in clinical and laboratory settings.
  • The patient's TSH was elevated, indicating an underactive thyroid.
• In feedback loop descriptions: TSH production is inhibited when circulating levels of T4 and T3 are sufficient (negative feedback).

Variants and Related Words

• TSH: The standard abbreviation.
• Thyrotropin: A precise synonym for thyroid-stimulating hormone.
• Thyrotrophic hormone: An older, less common variant.
• Thyroid-releasing hormone (TRH): A related hormone from the hypothalamus that the pituitary to release TSH.

Synonyms

• Thyrotropin
• TSH (acronym)

Notes

This is a compound noun. In standard usage, it is often hyphenated when used as a modifier before a noun (e.g., thyroid-stimulating hormone assay) but may not be hyphenated when standing alone. The acronym TSH is overwhelmingly preferred in technical and medical communication.

Noun

1. anterior pituitary hormone that stimulates the function of the thyroid gland