FETLOCK

fetlock

(noun) projection behind and above a horse’s hoof

fetlock, fetlock joint

(noun) the joint between the cannon bone and the pastern

Source: WordNet® 3.1

Etymology

Noun

fetlock (plural fetlocks)

A joint of the horse's leg below the knee or hock and above the hoof.

Synonym: ankle

The tuft of hair that grows at this joint.

Source: Wiktionary

Fet"lock, n. Etym: [OE. fetlak, fitlock, cf. Icel. fet pace, step, fit webbed foot of water birds, akin to E. foot. sq. root 77. See Foot.]

Definition: The cushionlike projection, bearing a tuft of long hair, on the back side of the leg above the hoof of the horse and similar animals. Also, the joint of the limb at this point (between the great pastern bone and the metacarpus), or the tuft of hair. Their wounded steeds Fret fetlock deep in gore. Shak.

Source: Webster’s Unabridged Dictionary 1913 Edition