bullock

A bullock is a young castrated bull, raised for beef. A field of bullocks, fatten the bullocks, bullock beef.

In British farming a bullock is a castrated male raised for meat, a steer is much the same in American and Irish use, and an ox is a castrated male trained for work. Heifer is the female equivalent before she has calved. The distinctions matter at market and almost nowhere else. Note bullock cart, still in daily use across much of South Asia, where bullocks are working animals rather than beef.