from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A chain collar that tightens like a noose when the leash is pulled, used to train or control dogs or other animals. Also called choke chain.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A dog's collar which tightens itself so as to choke the dog, when it pulls the leash. Used especially for training.
Sorry, no etymologies found.