pacer

noun

1. One who paces.
2. In harness racing, a horse with a gait in which the front and back legs on one side take a step together alternating with the legs on the other side; as opposed to a trotter.
3. (archaic)A horse whose natural gait is a pace (where the legs of the same side are lifted together).

   “And the hill-king spake to his footpages twain. Time with me goes slow. — "Put ye the gray pacers now unto the wain," But that grief is heavy I know.”

4. A pacemaker (one who sets the pace in a race).
5. A timer in an electric toothbrush that indicates how long the user should spend brushing in each part of the mouth.
6. (Australia)A mechanical pencil.
7. A British lightweight railbus diesel multiple unit of class 140, 141, 142, 143 or 144.

name

1. (US, abbreviation, acronym, alt-of)Acronym of Public Access to Court Electronic Records, an electronic public access service for United States federal-court documents.