The term ANIMAL MILK SOURCE can be summarized as the TEAT, which is a four-letter word. The TEAT is the organ of female mammals that produces milk for their young. It is located on the underside of the animal's body and is connected to the mammary glands, which produce the milk. The TEAT is an important source of nutrition for newborn animals, and it is also used by humans to extract milk from animals for consumption.