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单词 nipple
释义 nipple
n.
  1. a small projection in which the mammary ducts of either sex of mammals terminate and from which in females milk is secreted for the young.
  2. the teat of a feeding-bottle.
  3. a device like a nipple in function, e.g. the tip of a grease-gun.
  4. a nipple-like protuberance.
  5. US a short section of pipe with a screw-thread at each end for coupling.
Etymology: 16th c., also neble, nible, perh. dimin. f. neb
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