The word "nipple" is a noun, and it has a couple of meanings. Here’s an easy explanation:
Nipple on a Baby's Bottle: This is the flexible part on a baby’s feeding bottle or pacifier that the baby sucks on to drink milk. It is usually made of soft rubber or silicone.
Nipple on the Human Body: This is the small, raised part on the breast of a person (usually a woman) that is part of the mammary gland. It can also be found on male bodies, although it doesn’t serve the same function.
In medical contexts, the term "nipple" can be used in discussions about anatomy, breastfeeding, and various health issues related to the breast.
There are no common idioms or phrasal verbs that directly use the word "nipple," but you might hear phrases like "nipple confusion," which refers to a situation where a baby gets confused between breastfeeding and bottle-feeding because of different nipple shapes or sizes.
The word "nipple" is important in both parenting and health discussions.