A dairy cow is a bovine animal that is primarily used in the dairy industry for milk production. However, there are many other names or synonyms for this term used in different parts of the world. For example, in Britain, a dairy cow is called a "milch cow" or "milker," while in Australia, it is referred to as a "milking cow." In North America, the term "dairy cattle" or "milch cattle," is often used instead of dairy cow. Another common synonym for a dairy cow is a "Holstein;" this is because Holstein cows are the most common breed used in dairy farming. Other breeds used for milk production include Jersey, Brown Swiss, Ayrshire, and Guernsey cows.