Nipple

The nipple is a raised region of tissue on the surface of the breast from which, in lactating females, milk from the mammary gland leaves the body through the lactiferous ducts to nurse an infant. The milk can flow through the nipple passively, or it can be ejected by smooth muscle contractions that occur along with the ductal system. The nipple is surrounded by the areola, which is often a darker colour than the surrounding skin.

stimulation of the breast for breastfeeding, sexual activity or an indirect non-sexual response

a topfreedom campaign created in 2012

body piercing, centered usually at the base of the nipple

thumb|Swiss artist Milo Moiré performs, wearing pasties and a cut-out [[bra top, 2016]]

nipples turned inside the breast

painful, postpartum condition in breastfeeding women

thumb|upright=1.2|Teats protruding from the udder of a [[cow]] thumb|upright=0.9|Part of a milking device that fits over the teats of a cow.

2014 film by Lina Esco

fluid filled blister on the nipple

temporary protective sheath worn during breastfeeding

darkening of the nipple or areola