Terrier, or Canis terrarius, a variety of the dog-kind, which is of different colours, being sometimes spotted, though generally of a liver, or black hue : its body seldom exceeds 18 inches in length, and the head is embellished with short, smooth, pendent ears.

Terriers are very useful to agriculturists, especially for exterminating rats, polecats, and similar depredators. Farther, these animals are remarkable for their vigilance, and are therefore frequently employed as house-dogs ; but their principal services consist in hunting badgers, foxes, rabbits, and other quadrupeds which burrow under ground; because they enter the holes of such wild creatures, and either kill or draw them out of their hiding-places. - An account of the diseases to which terriers are liable, the reader will find in the article Dog.