What is the definition or description of: inverted nipples?

Inward: An inverted nipple (occasionally invaginated nipple) is a nipple that, instead of pointing outward, is retracted into the breast.

Not orth BUT: Usually a nipple protrudes from the breast. Such as pointy, perkey nipples, as a nipple would be if the weather is " nippy ". An inverted nipple  is 1that is retracted inward, so the breast surface has a small indentation where the nipple is. This can= norm 4 some women, tho does respond 2 stim. The nipple that goes from norm 2 inverted may b a sign of underlying disease & = c ur gyn 2B sure ok.