Source : Webster's Revised Unabridged Dictionary (1913)

Udder \Ud"der\, n. [OE. uddir, AS. [=u]der; akin to D. uijer, G.
   euter, OHG. [=u]tar, [=u]tiro, Icel. j[=u]gr, Sw. jufver,
   jur, Dan. yver, L. uber, Gr. o"y^qar, Skr. [=u]dhar.
   [root]216. Cf. {Exuberant}.]
   1. (Anat.) The glandular organ in which milk is secreted and
      stored; -- popularly called the {bag} in cows and other
      quadrupeds. See {Mamma}.

            A lioness, with udders all drawn dry. --Shak.

   2. One of the breasts of a woman. [R.]

            Yon Juno of majestic size, With cowlike udders, and
            with oxlike eyes.                     --Pope.

Source : WordNet®

udder
     n : mammary gland of bovids (cows and sheep and goats) [syn: {bag}]