Source : Webster's Revised Unabridged Dictionary (1913)

Mud \Mud\, n. [Akin to LG. mudde, D. modder, G. moder mold, OSw.
   modd mud, Sw. modder mother, Dan. mudder mud. Cf. {Mother} a
   scum on liquors.]
   Earth and water mixed so as to be soft and adhesive.

   {Mud bass} (Zo["o]l.), a fresh-water fish ({Acantharchum
      pomotis}) of the Eastern United States. It produces a deep
      grunting note.

   {Mud bath}, an immersion of the body, or some part of it, in
      mud charged with medicinal agents, as a remedy for
      disease.

   {Mud boat}, a large flatboat used in deredging.

   {Mud cat}. See {Catfish}.

   {Mud crab} (Zo["o]l.), any one of several American marine
      crabs of the genus {Panopeus}.

   {Mud dab} (Zo["o]l.), the winter flounder. See {Flounder},
      and {Dab}.

   {Mud dauber} (Zo["o]l.), a mud wasp.

   {Mud devil} (Zo["o]l.), the fellbender.

   {Mud drum} (Steam Boilers), a drum beneath a boiler, into
      which sediment and mud in the water can settle for
      removal.

   {Mud eel} (Zo["o]l.), a long, slender, aquatic amphibian
      ({Siren lacertina}), found in the Southern United States.
      It has persistent external gills and only the anterior
      pair of legs. See {Siren}.

   {Mud frog} (Zo["o]l.), a European frog ({Pelobates fuscus}).
      

   {Mud hen}. (Zo["o]l.)
   (a) The American coot ({Fulica Americana}).
   (b) The clapper rail.

   {Mud lark}, a person who cleans sewers, or delves in mud.
      [Slang]

   {Mud minnow} (Zo["o]l.), any small American fresh-water fish
      of the genus {Umbra}, as {U. limi}. The genus is allied to
      the pickerels.

   {Mud plug}, a plug for stopping the mudhole of a boiler.

   {Mud puppy} (Zo["o]l.), the menobranchus.

   {Mud scow}, a heavy scow, used in dredging; a mud boat.
      [U.S.]

   {Mud turtle}, {Mud tortoise} (Zo["o]l.), any one of numerous
      species of fresh-water tortoises of the United States.

   {Mud wasp} (Zo["o]l.), any one of numerous species of
      hymenopterous insects belonging to {Pep[ae]us}, and allied
      genera, which construct groups of mud cells, attached,
      side by side, to stones or to the woodwork of buildings,
      etc. The female places an egg in each cell, together with
      spiders or other insects, paralyzed by a sting, to serve
      as food for the larva. Called also {mud dauber}.

Source : WordNet®

mud puppy
     n 1: aquatic North American salamander with red feathery external
          gills [syn: {Necturus maculosus}]
     2: large salamander of North American rivers and streams [syn:
        {hellbender}, {Cryptobranchus alleganiensis}]
     3: larval salamander of mountain lakes of Mexico that usually
        lives without metamorphosing [syn: {axolotl}, {Ambystoma
        mexicanum}]