Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun 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 the GNU version of the Collaborative International Dictionary of English.

  • noun any physiologically active internal secretion, especially one of uncertain classification.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A hormone or similar compound

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun any physiologically active internal secretion especially one of uncertain classification

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

aut(o)- + Greek akos, cure + -oid.

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek aut- +‎ ἄκος (akos, "remedy") +‎ -oid

Examples

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