The small projection near the center of the mammary gland containing the outlets of the milk ducts through which young mammals obtain milk from the adult female; a teat.

• 乳头靠近乳腺中心的小的凸起物，含有乳导管的出口，幼小的哺乳动物从成年雌性身上由此吸取乳汁；乳头