* Teats: This is the most common and neutral term for the mammary glands of mammals, including pigs.
* Mammary glands: This is a more scientific and formal term.
* Udder: While udder is usually associated with cows, it can be used in a broader sense to refer to the whole mammary system, including the teats, of a female mammal.
It's important to note that using terms like "pig nipples" is generally not considered appropriate in polite conversation.