Webster's English Dictionary

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udder

ud.der \'*d-*r\ n [ME, fr. OE u-der; akin to OHG u-tar udder, L uber, 
   Gk]outhar, Skt u-dhar 1: a large pendulous organ consisting of two or more 
   mammary glands enclose d in a common envelope and each provided with a 
   single nipple 2: a mammary gland