The term "mammary nipple" is often used in medical contexts to describe the protruding surface of the breast from which milk is secreted during lactation. However, there are several other synonyms for this anatomical feature that you may encounter in everyday language. Some of these include breast nipple, teat, tit, and boobie. While these terms are colloquial and may be considered less formal than "mammary nipple," they are still widely used and understood by many people. Ultimately, the choice of terminology may depend on the context and audience of a given conversation or piece of writing.