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Pronunciation

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Singular
nipple

Plural
nipples

  1. (countable) (anatomy) A nipple is a mammary gland. On female mammals, milk is secreted from it.
  2. (countable) A nipple is an artificial nipple (definition 1) used for bottle-feeding infants.
  3. (countable) A nipple is a mechanical device that allows liquids or gases to pass through in a regulated manner.