[ nip-uh l ]
/ ˈnɪp əl /


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.

Origin of nipple

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


nip·ple·less, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for nipple

British Dictionary definitions for nipple

/ (ˈnɪpəl) /


Also called: mamilla, papilla, teat the small conical projection in the centre of the areola of each breast, which in women contains the outlet of the milk ductsRelated adjective: mamillary
something resembling a nipple in shape or function
Also called: grease nipple a small drilled bush, usually screwed into a bearing, through which grease is introduced
US and Canadian an informal word for dummy (def. 11)

Word Origin for nipple

C16: from earlier neble, nible, perhaps from neb, nib
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for nipple

[ nĭpəl ]


The projection at the apex of the mammary gland, on the surface of which the lactiferous ducts open, surrounded by the circular pigmented areola.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.

Science definitions for nipple

[ nĭpəl ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.