GNU Collaborative International Dictionary of English

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1.       
   Rudd (?), n. [See Rud, n.] (Zool.) A fresh-water European fish of the Carp family (Leuciscus erythrophthalmus). It is about the size and shape of the roach, but it has the dorsal fin farther back, a stouter body, and red irises. Called also redeye, roud, finscale, and shallow.  A blue variety is called azurine, or blue roach.
   
   [1913 Webster]