Fractions

The times recorded during the race; with timing starting just past the gate or when the gates open, then parroted for the quarter, half, three-quarters etc. Used as an indication of ability and speed.

Across the Board

Refers to betting on a horse to finish first, second, and third to cover any of those scenarios happening during a race

Scratch

A horse is a scratch when injury or other necessity causes it to be withdrawn from the race.