jockey-wheel

(jok’i-hwél), n. A wheel used to ride upon and pre a rope or cable into a groove of another wheel from which the rope or cable is paid out. The bearings of a jockey-wheel are often in the end of a lever by which the jockey is held to its duty. These wheels are much used in laying submarine cables. Also jockey. jockey-whip (jok’i-hwip), n: A whip used by a jockey.