Is a bull cow a bovine?

A bovine is another Word for domesticated cattle of the species Bos primigenius, subspecies taurus(European/British-type cattle) and B. indicus(tropical/desert-type cattle). Colloquially, they are also called "cows."

Another Answer:

Unlike the name for all other farm animals, English has no widely-known Word for (gender-unspecified) "bovine animal." ("Bovine" is really an adjective.) "Horse" can refer to a mare or a stallion, "sheep" to a ewe or ram, etc. "Cattle" comes the closest, but is strictly plural. "Cow" implies the female, ""bull" the male, and "steer" and "ox" neutered/castrated bulls.