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From earlier neple, nypil, *neble, believed to be a diminutive of nib, neb(tip, point), equivalent to nib +‎ -le.


A woman's breasts, with the nipple indicated.
a pipe nipple ("connector")
spoke nipples


nipple (plural nipples)

  1. (anatomy) The projection of a mammary gland from which, on female mammals, milk is secreted.
  2. An artificial nipple (definition 1) used for bottle-feeding infants.
  3. A mechanical device through which liquids can be passed in a regulated manner.
  4. A short tube threaded at both ends, used as a connector.
  5. An internally threaded piece which holds a bicycle spoke in place on the rim.
    Turn the nipples on to the bicycle spokes only one turn, for each spoke on the new wheel all the way around until they are all snug, then check alignment.
  6. Any small physical protrusion, such as the lumps on the F and J keys on American keyboards.
  7. Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part.


Derived terms[edit]