noun
nipple
NIP-ul/ˈnɪpl/
A small raised part of a breast or udder through which milk flows.
Milk flows through the nipple on the cow's udder.

Etymology
Earlier neble named the same breast projection and was probably a diminutive of neb, ‘beak’ or ‘snout.’ On that explanation, the nipple is pictured as a little projecting beak.
In context
A moose nipple is very small compared to a cow nipple. A calf doesn't know exactly where to find them and must learn.
More examples
- The baby latches onto the nipple to nurse.
- Her nipples feel sore after breastfeeding.
- A small amount of milk leaks from one nipple.
Forms
nipple · nipples
Similar words
- teat
- Usually refers to a nipple on an animal's udder.