Keirin

Races are about 2 kilometers long: 8 laps on a 250 m track, 6 laps on a 333 m track, 5 laps on a 400 m track. Lots are drawn to determine starting positions for the sprint riders behind the pacer, which is usually a motorcycle, but can be a derny or tandem bicycle. Riders must remain behind the pacer for a predetermined number of laps. Initially i...
Found on http://en.wikipedia.org/wiki/Keirin

keirin

(say Kay-rin) a track race led by a pacer on bike or motorcycle that develops into massed sprint; a UCI world championship event and parimutuel-style of bicycle racing in Japan; see NJS.
Found on http://bikecult.com/bikecultbook/glossary_english.html

Keirin

(Say: Kay - rin) - Keirin is a mass-start track race which originated in Japan as a betting event (sort of like horse racing with humans) and is now also an Olympic event. In traditional Keirin lots are drawn to determine starting positions and 6 to 9 sprinters compete after a paced start. The pacer starts at a slow 15 mph and riders are required t...
Found on https://www.encyclo.co.uk/local/22515

Keirin

A sprint race on the track where a group of riders
Found on http://cycling.isport.com/cycling-guides/cycling-glossary

Keirin

A track race in which riders compete in a sprint after completing a certain number of laps behind a motorcycle pacer (pronounced kay-rin).
Found on http://www.dailypeloton.com/cyclegloss.asp
No exact match found