Bolt

A sudden veering to the inside or outside rail, often caused by the horse spooking or shying from something.

Synthetic Surface

A racing surface comprised of silica sand and fibers, such as recycled carpet or spandex. The mixture is then sealed with wax.

Pari-Mutuel

A pool style wagering system, where all money input through betting is divided among those with winning tickets (save for various deductions by the track operators).