from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Thyroxine: a hormone produced by the thyroid gland.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. hormone produced by the thyroid glands to regulate metabolism by controlling the rate of oxidation in cells
From tetra- + iodo- + thyronine. (Wiktionary)