a protuberance of the mamma or breast where, in the female, the milk ducts discharge; teat.
something resembling it, as the mouthpiece of a nursing bottle or pacifier.
a short piece of pipe with threads on each end, used for joining valves.

1520–30; earlier neble, nib(b)le, nepil; perhaps akin to nib; compare Danish nip point; see -le

nippleless, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
nipple (ˈnɪpəl)
1.  mamilla, papilla, Also called: teat the small conical projection in the centre of the areola of each breast, which in women contains the outlet of the milk ductsRelated: mamillary
2.  something resembling a nipple in shape or function
3.  Also called: grease nipple a small drilled bush, usually screwed into a bearing, through which grease is introduced
4.  (US), (Canadian) an informal word for dummy
Related: mamillary
[C16: from earlier neble, nible, perhaps from neb, nib]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

1538, nyppell, alt. of neble, probably dim. of O.E. neb "bill, beak, snout" (see neb), hence, lit. "a small projection."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

nipple nip·ple (nĭp'əl)
The projection at the apex of the mammary gland, on the surface of which the lactiferous ducts open, surrounded by the circular pigmented areola. Also called mamilla, papilla mammae, teat, thelium.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
nipple   (nĭp'əl)  Pronunciation Key 
A small projection near the center of the mammary gland. In females, the nipple contains the outlets of the milk ducts.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

nipple definition


The Free On-line Dictionary of Computing, © Denis Howe 2010
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