from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A steroid hormone produced by insects and crustaceans that promotes growth and controls molting.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hormone in insects and other arthropods that promotes molting.
ecdys(is) + (horm)one.(American Heritage® Dictionary of the English Language, Fourth Edition)