dew·lap (dlăp′, dy-)
1. A fold of loose skin hanging from the neck of certain animals.
2. A pendulous part similar to this, such as the wattle of a bird.
3. A fold of loose skin hanging from the neck of a person.
[Middle English dewlappe : dew, of unknown meaning (akin to Danish and Norwegian dog- in Danish doglæb and Norwegian doglæp, dewlap) + lappe, fold; see LAP2.]
(click for a larger image)dewlap
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.