The phrase "breast nipple" refers to the small, round, and usually sensitive area on a person's breast that is used to feed babies milk. Full definition
Since it is wide neck, the nipple is also wider, looking like a real breast nipple. (babieslounge.com)
Please avoid sheer see - through clothing that could possibly expose female breast nipples. (housegoeshome.com)
So long as the seal remains intact, the infant obtains milk easily by using a peristaltic - like motion of the tongue to compress the flattened soft breast nipple against the palate. (brianpalmerdds.com)