Roan
A horse color where the majority of the coat of the horse is a mixture of red and white hairs or brown and white hairs. The mane, tail and legs may be black, chestnut or roan unless white markings are present. Starting with foals of 1993, the color classifications gray and roan were combined as "roan or gray." 

Route
Broadly, a race distance of longer than 1 1/8 miles.  

Router
Horse that performs well at longer distances.  

Run-Out Bit
A special type of bit to prevent a horse from bearing out (or in).