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

Examples of udder in a Sentence

Recent Examples on the Web

That udder cell was inserted into an empty egg cell from another sheep, and over six days, a team at the Roslin Institute carefully studied it in a test tube, looking for signs of normal development. —Sarah Holzmann, Smithsonian Magazine, 22 Feb. 2025

Apparently, cow udders are strong receptors for the highly contagious infection, which finds a home swimming in raw milk. —Jim Martin, The Denver Post, 4 Feb. 2025

Luna shares the details of her carnivore diet to over 200,000 followers, even posting videos drinking milk straight from the udder. —Alyssa Goldberg, USA TODAY, 4 Feb. 2025

The virus homes in on the udders of milking cows, and studies have found high concentrations of bird flu virus in raw milk. —Cnn.com Wire Service, The Mercury News, 8 Jan. 2025

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

Rhymes for udder

• rudder
• scudder
• shudder

Kids Definition

udder

noun

ud·​der ˈəd-ər 

1

: a large bag-shaped organ (as of a cow) consisting of two or more mammary glands enclosed in a common pouch but with each having a separate nipple

2

: a mammary gland

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