Backside: The racetrack's barn area.

Bay: A color ranging from tan to dark chestnut with black mane, tail and points.

Beyer Speed Rating: A measure of performance popularized by Andy Beyer of the Washington Post.

Bounce: An exceptionally poor performance on the heels of an exceptionally good one.

Broodmare: Female Horse used for breeding.

Broodmare Sire: A sire whose female offspring become producers of exceptional performers.

Bullet: Fastest workout of the day at a particular distance.