from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An organic substance, such as a hormone, produced in one part of an organism and transported by the blood, lymph, or sap to another part of the organism where it exerts a physiologic effect on that part.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A hormone or similar compound
from the GNU version of the Collaborative International Dictionary of English
- n. any physiologically active internal secretion, especially one of uncertain classification.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. any physiologically active internal secretion especially one of uncertain classification
aut(o)- + Greek akos, cure + -oid.(American Heritage® Dictionary of the English Language, Fourth Edition)
Ancient Greek aut- + ἄκος (akos, "remedy") + -oid (Wiktionary)