noun
One who paces.
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.
A pacemaker (one who sets the pace in a race).
A timer in an electric toothbrush that indicates how long the user should spend brushing in each part of the mouth.
noun
(Australia) A mechanical pencil.