from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A thyroid hormone, C15H12I3NO4, similar to thyroxine but more potent, used in the treatment of hypothyroidism.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The most powerful thyroid hormone, affecting almost every process in the body, including body temperature, growth, and heart rate.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. thyroid hormone similar to thyroxine but with one less iodine atom per molecule and produced in smaller quantity; exerts the same biological effects as thyroxine but is more potent and briefer
tri- + iodo- + thyronine, an amino acid (thyr(o)- + -on(e) + -ine2).(American Heritage® Dictionary of the English Language, Fourth Edition)
tri- + iodothyronine (Wiktionary)