1 : having nipples or small protuberances. 2 : having the form of a bluntly rounded protuberance.

What is Mammillations?

Medical Definition of mammillation

1 : a mammillated or mammilliform protuberance. 2 : the condition of having nipples or protuberances resembling nipples.

What's the protuberance?

A protuberance is something that sticks out, like a swelling or a lump or a bunion on your foot. A protuberance doesn't have to be hideous; it could be your nose on your face or a knot on a tree.