udder
noun
ud·der ˈə-dər 
1
: a large pendulous organ consisting of two or more mammary glands enclosed in a common envelope and each provided with a single nipple see cow illustration
2
: mammary gland
Example Sentences
Recent Examples on the Web The technical term for the clouds is mammatus, which is derived from Latin for udder or breast, according to Merriam-Webster Dictionary. 
From Usa Today Network And Wire Reports, USA TODAY, 22 July 2022 Kennedy Kanagawa, who handles the cow and other puppets, brings out some of the most lifelike and charming expressions, despite Milky White’s face, ribs and udder being made out of cardboard. Jordan Moreau, Variety, 11 July 2022 Luma’s a working mother, allowed only a nuzzle or two with her baby before the babe is given a rubber udder attached to a pail and Mom is back to be milked or mated with, incongruously set to the tunes of lo-fi contemporary pop ballads. Katie Walsh, Los Angeles Times, 6 Apr. 2022 For every one depicting a sailboat or a sunset, there is another of an innuendo that needs little explanation: a man complimenting a woman’s fruit tree, a dairyman praising his cow’s udder while his buxom wife looks on. Washington Post, 9 Mar. 2022 Tour goers gawked through a window Wednesday as Natalie the cow, distracted by treats, stood as the robot sprayed a sanitizing iodine mist on her udder before attaching a milking hose. oregonlive, 6 Nov. 2021 So First Cow is, in part, a slow-motion heist movie, with Cookie and King-Lu sneaking out just enough liquid gold from the sacred udder to maintain a booming biscuit business. Darren Franich, EW.com, 20 Apr. 2021 Worse, in searing memory, cows with their hooves, udder and even legs burned off still alive who had to be euthanized. Cheri Lucas Rowlands, Longreads, 18 Dec. 2020 Sometimes the runts need help getting to a sow’s udder for milk. Adam Belz, Star Tribune, 15 Aug. 2020 See More
From Usa Today Network And Wire Reports, USA TODAY, 22 July 2022 Kennedy Kanagawa, who handles the cow and other puppets, brings out some of the most lifelike and charming expressions, despite Milky White’s face, ribs and udder being made out of cardboard. Jordan Moreau, Variety, 11 July 2022 Luma’s a working mother, allowed only a nuzzle or two with her baby before the babe is given a rubber udder attached to a pail and Mom is back to be milked or mated with, incongruously set to the tunes of lo-fi contemporary pop ballads. Katie Walsh, Los Angeles Times, 6 Apr. 2022 For every one depicting a sailboat or a sunset, there is another of an innuendo that needs little explanation: a man complimenting a woman’s fruit tree, a dairyman praising his cow’s udder while his buxom wife looks on. Washington Post, 9 Mar. 2022 Tour goers gawked through a window Wednesday as Natalie the cow, distracted by treats, stood as the robot sprayed a sanitizing iodine mist on her udder before attaching a milking hose. oregonlive, 6 Nov. 2021 So First Cow is, in part, a slow-motion heist movie, with Cookie and King-Lu sneaking out just enough liquid gold from the sacred udder to maintain a booming biscuit business. Darren Franich, EW.com, 20 Apr. 2021 Worse, in searing memory, cows with their hooves, udder and even legs burned off still alive who had to be euthanized. Cheri Lucas Rowlands, Longreads, 18 Dec. 2020 Sometimes the runts need help getting to a sow’s udder for milk. Adam Belz, Star Tribune, 15 Aug. 2020 See More Word History
Etymology
Middle English, from Old English ūder; akin to Old High German ūtar udder, Latin uber, Greek outhar, Sanskrit ūdhar
First Known Use
before the 12th century, in the meaning defined at sense 1
Kids Definition
udder
noun
ud·der ˈə-dər
: a large bag-shaped organ (as of a cow) enclosing two or more milk-producing glands each draining into a separate nipple on the lower surface
Medical Definition
udder
noun
ud·der ˈəd-ər
: a large pendulous organ in various mammals and especially a female domestic bovine consisting of two or more mammary glands enclosed in a common envelope and each provided with a single nipple