陥かん没ぼつ乳にゅう頭とう

noun

inverted nipple; retracted nipple

Medical/anatomical term for a nipple that is pulled inward rather than protruding. Used in clinical contexts.

• 陥かん没ぼつ乳にゅう頭とうは、先せん天てん的てきな場ば合あいと後こう天てん的てきな場ば合あいがある。

  Inverted nipples can be congenital or acquired.