electric hare

noun

(in greyhound racing) a model of a hare, mounted on an electrified rail, which the dogs chase

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012