(motor racing) The most optimal (fastest) line or course on a track.

plural of head-race

plural of head race

plural of rat race

The sport of greyhound racing

The sport of racing greyhounds around a track. The greyhounds follow a remote-controlled mechanical hare around the track.

plural of elephant race

A form of drag racing that allows for a handicap between predicted elapsed time of the two cars over a standard distance.

plural of bracket race

plural of racing green