Tags: Anatomical Structure.
In its most general form a nipple is a structure from which a fluid emanates. More specifically it is the projection on the breasts or udder of a mammal by which breast milk is delivered to a mother’s young. In this sense it is often called a teat especially when referring to non-humans and the medical term used to refer to it is papilla. The rubber mouthpiece of a baby bottle or pacifier may also be referred to as a nipple or a teat.
