Nipple definitions

nĭp'əl
Any of various devices functioning like or resembling a nipple, especially:
  • A regulated opening for discharging a liquid, as in a small stopcock.
  • A pipe coupling threaded on both ends.
  • A short extension of pipe to which a nozzle can be attached.
  • A small projection through which grease in a grease gun can be forced into a bearing.
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A natural or geographic projection resembling a nipple, as a mountain crest.
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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.
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A corresponding projection of the male breast.
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The rubber cap on a bottle from which a baby nurses.
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A pacifier for an infant.
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The small protuberance on a breast or udder through which, in the female, the milk passes in suckling the young; teat.
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An artificial teatlike part, as of rubber, in the cap of a baby's nursing bottle.
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Any projection, part, or thing resembling the nipple of a breast in shape or function.
  • A short piece of pipe with both ends threaded.
  • A projection with a small opening through which a liquid or grease can be forced.
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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.
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A corresponding projection of the male breast.
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The rubber cap on a bottle from which a baby nurses.
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A pacifier for an infant.
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A small projection near the center of the mammary gland. In females, the nipple contains the outlets of the milk ducts.
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The projection of a mammary gland from which, on female mammals, milk is secreted.
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An artificial nipple (definition 1) used for bottle-feeding infants.
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A mechanical device through which liquids can be passed in a regulated manner.
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A short tube threaded at both ends, used as a connector.

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.

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Any small physical protrusion, such as the lumps on the F and J keys on American keyboards.
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Any small physical protrusion on an automotive, a machine part or any other part that fits into a groove on another part.
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Origin of nipple

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