Thyrotropin is a hormone produced by the pituitary gland that regulates the function of the thyroid gland. It is also known as thyroid-stimulating hormone or TSH. Some synonyms for thyrotropin include thyrotrophin, thyrotropic hormone, and thyroid-stimulating hormone. These terms all refer to the same hormone and are often used interchangeably in medical literature and discussions. Other related terms include thyroxine, triiodothyronine, and thyroid hormone, which are produced by the thyroid gland in response to TSH. Understanding these different terms can be important for diagnosing and treating thyroid conditions, as well as for understanding the role of the thyroid gland in overall health and wellness.