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Chronic disorder involving the tarsus (i.e., hock) of the horse.
See also: bog spavin, bone spavin, blood spavin.
Synonym(s): jack spavin, jack


1. male donkey; called a stallion in Great Britain.
2. see track leg.

jack colt
male donkey less than 3 years of age.
mule jack
one bred to mares for the production of mules.
References in periodicals archive ?
Besides the laptop dock, Motorola is also providing options for desktop and home entertainment setups via its HD dock which comes equipped with three USB ports and an HDMI jack around the back.
Ali always used to follow Jack around, they were inseparable," said mum-of-three Joanne.
ANDY MURRAY draped a Union Jack around his shoulders as he prepared to fly the flag once more for British tennis in his first Wimbledon quarter-final against Rafael Nadal today.