Definition

Noun: A thyroid hormone derivative; specifically, a thyronine molecule that has iodine atoms attached to it. Iodothyronines are the active forms of thyroid hormones produced and secreted by the thyroid gland, crucial for regulating metabolism, growth, and development in the body.

Usage Examples

• The most important iodothyronines in human physiology are thyroxine (T4) and triiodothyronine (T3).
• The laboratory test measures the level of iodothyronine in the blood serum.
• The synthesis of iodothyronine requires adequate dietary iodine.

Advanced Usage

• Iodothyronine deiodinase: This refers to a family of enzymes responsible for activating or deactivating thyroid hormones by adding or removing iodine atoms from the iodothyronine molecule. For example, the conversion of T4 to the more active T3 is catalyzed by iodothyronine deiodinase.

Variants and Related Words

• Thyroxine (T4): The major iodothyronine hormone produced by the thyroid gland, containing four iodine atoms.
• Triiodothyronine (T3): The more metabolically active iodothyronine hormone, containing three iodine atoms.
• Reverse triiodothyronine (rT3): An inactive form of iodothyronine.

Synonyms

• Thyroid hormone (in a general, functional context)
• (No direct single-word synonyms; it is a specific biochemical term)

Related Phrases

• Iodothyronine synthesis: The process by which the thyroid gland produces iodothyronine hormones.
• Serum iodothyronine: Refers to the concentration of iodothyronine hormones in the blood, commonly measured in diagnostic tests.

Noun

1. thyronine with iodine added