Terrier dog breeds Terrier is the generic name for a group of dog breeds that share a common origin, but have such diverse physical characteristics that in some cases it is difficult to think that they are related. Terrier dogs are usually small to medium-sized, and generally have a restless and determined character. Most of these breeds originated in Great Britain, but there are terriers from different parts of the world. The word "terrier" (in French) derives from the Latin "terra", which means "land". These dogs were named in conjunction with that term because they were primarily used to hunt burrowing animals underground. While all breeds in this group carry the word "terrier" in their name, not all breeds that carry this term belong to group 3 of the FCI, intended to group terrier-type dog breeds. For example, the Russian black terrier corresponds to the group of pinscher and schnauzer dogs (group 2). On the other hand, not all do...