Nipple

The conic elevation in the center of the mammary areola. The mammilla, acromastium, or thele. N. -cactus. See Mammillaria . N., Cracked, a nipple the epidermis of which is broken in places. N.-line, in physical diagnosis, a vertical line drawn on the surface of the chest through the nipple. N. -protector, a device worn by nursing women to protect the nipple. It is Nipple-protector. called also a Nipple-shield. N., a nipple drawn Retracted, below the surrounding level. N. -shield. See Nprotector.