maiden race
A race for non-winners.
mare
A female horse 4 years of age or older.
medication
A substance, medicine or remedy used for healing pain.
middle distance
Broadly, from one mile to 1-1/8 miles.
minus pool
A mutuel pool caused when a horse is so heavily played that, after deductions of state tax and commission, there is not enough money left to pay the legally prescribed minimum on each winning bet. The racing association usually makes up the difference.
money rider
A rider who excels in rich races.
