Earmuffs
A piece of equipment that covers a horse's ears to prevent it from hearing distracting sounds.  

Eased
A horse that is gently pulled up during a race.  

Easily
Running or winning without being pressed by driver or opposition.  

Entry
Two or more horses with common ownership (or in some cases trained by the same trainer) that are paired as a single betting unit in one race and/or are placed together by the racing secretary as part of a mutuel field. Rules on entries vary from state to state. Also known as a "coupled entry."  

Entry Fee
Money paid by an owner to enter a horse in a stakes race.  

Evenly
Neither gaining nor losing position during a race.  

Exacta
A wager in which the first two finishers in a race, in exact order of finish, must be picked. Called an "exactor" in Canada.  

Exotic (wager)
Any wager other than win, place or show.

Extended
Running at top speed.