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- Acceptor: A horse confirmed by the owner or trainer to be a runner in a race.
- Aged: A horse seven years old or older.
- All Up: A Type of Bet where the winnings of one race is carried over to the next race and so forth.
- Apprentice: A young jockey, usually under 21 years of age, who is still in training. Recent rule changes allow older riders just starting out to work their way through their "apprenticeship".
- Apprentice allowance: Reduction in the weight to be carried by a horse which is to be ridden by an apprentice jockey. Also called a "claim". It varies from 4 kg to 1.5 kg depending on the number of winners the apprentice has ridden. Recent rule changes have resulted in an increase in the maximum amount able to be claimed—from 3 kg to 4 kg.
- Approximates: The TAB prices horses are showing before a race begins.
- Asparagus: Name given to a punter who arrives on course with a stack of ‘mail’, hence: more tips than a tin of asparagus.
Read more about this topic: Glossary Of Australian And New Zealand Punting