Cattle domesticated mammals of the genus Bos.

Bull is an in-tact male bovine.
Bull calf is a male calf.
Calf is a young bovine. This term is used from the time of birth up until about 6 to 10 months of age when the animal is weaned.
Cow is a female bovine that has had a calf. (This term may also be used for other species)
Heifer is a female bovine that has not had a calf.
Heifer calf is a female calf.
Steer is a castrated male bovine or can be a future ox that is less than 4 years old.
Ox is castrated bull that has been trained to work and is at least 4 years of age.
Oxen (two) is the plural of ox.