lame
A term used to describe a horse that is limping, has difficulty walking or is sore.
lead [LED]
Lead weights carried in pockets on both sides of the saddle, used to make up the difference between the actual weight of the jockey and the weight the horse has been assigned to carry during the race.
length
A measurement approximating the length of a horse, used to denote distance between horses in a race.
lock
Slang for a “sure” winner.