nipple
//ˈnɪp.əl//
Noun
nippleSingular
nipplesPlural
1
The small projection on the breast or udder through which milk is discharged in mammals.
The baby latched onto the mother's nipple to nurse.
2
A rubber or plastic device resembling a nipple, used on a baby's bottle for feeding.
The baby refused to drink from the bottle because the nipple was too hard.
3
A small projection or fitting, especially a threaded pipe fitting used to connect two pipes.
The plumber used a brass nipple to connect the two pipes.