Spayed heifers or steers. Cows aren't the ones that get neutered, it's either the heifers or bulls that do. Neutered bulls are called steers (or bullocks in Europe), and heifers that are not suitable for breeding which are spayed (by a simple surgical procedure of removing the ovaries) are called spayed heifers.
When castrated he will be called a steer no matter how young.
Bullock.
A steer if referring to a castrated bovine raised for beef, or an ox if referring to a castrated, usually horned bovine used for draft.
It's called a steer.
Dairy males are called bulls if intact and steers if castrated.
A steer is a castrated male bovine (or bull) that is raised for meat. An ox is a castrated male bovine (can also be female too) that is trained and used for pulling carts, wagons, plows, etc.
A castrated male bovine is commonly referred to as a steer. Steers are male cattle that have been neutered, typically for better temperaments and improved meat quality. Castration is usually done when the animal is young to minimize stress and complications.
A young steer is called a bullock. It is a young male bovine that has been castrated.
A male horse castrated before reaching sexual maturity is called a gelding. A male horse that is sexually mature is called a stallion.
A bull is an intact (non-neutered) male bovine, and a steer or bullock is a castrated male bovine.
Bullocks, a European term for a castrated male bovine, can be slaughtered and eaten.
A beef cow or a beef steer (castrated male bovine).