What does nipple mean in medicine?

The nipple is a part of the breast structure. Nipple is the most important part of the whole breast tissue, and proper nipple appearance can better set off the beauty of plump breasts. There are many mammary vesicles in the female breast, and each mammary vesicle has a mammary duct opening at the nipple. The milk secreted by mammary vesicles in postpartum women can drip from mammary duct to nipple.

The medical name of the joint between syringe and needle is nipple.