/fet"lok'/ , n.
1. the projection of the leg of a horse behind the joint between the cannon bone and great pastern bone, bearing a tuft of hair. See diag. under horse .
2. the tuft of hair itself.
3. Also called fetlock joint . the joint at this point.
[ 1275-1325; ME fitlok, akin to MHG viz ( ze ) loch, ult. deriv. of Gmc * fet-, a gradational var. of * fot- FOOT ]