The Collaborative International Dictionary of English v.0.48:

Prairie \Prai"rie\, n. [F., an extensive meadow, OF. praerie,
   LL. prataria, fr. L. pratum a meadow.]
   1. An extensive tract of level or rolling land, destitute of
      trees, covered with coarse grass, and usually
      characterized by a deep, fertile soil. They abound
      throughout the Mississippi valley, between the Alleghanies
      and the Rocky mountains.
      [1913 Webster]

            From the forests and the prairies,
            From the great lakes of the northland. --Longfellow.
      [1913 Webster]

   2. A meadow or tract of grass; especially, a so called
      natural meadow.
      [1913 Webster]

   Prairie chicken (Zool.), any American grouse of the genus
      Tympanuchus, especially Tympanuchus Americanus
      (formerly Tympanuchus cupido), which inhabits the
      prairies of the central United States. Applied also to the
      sharp-tailed grouse.

   Prairie clover (Bot.), any plant of the leguminous genus
      Petalostemon, having small rosy or white flowers in
      dense terminal heads or spikes. Several species occur in
      the prairies of the United States.

   Prairie dock (Bot.), a coarse composite plant (Silphium
      terebinthaceum) with large rough leaves and yellow
      flowers, found in the Western prairies.

   Prairie dog (Zool.), a small American rodent (Cynomys
      Ludovicianus) allied to the marmots. It inhabits the
      plains west of the Mississippi. The prairie dogs burrow in
      the ground in large warrens, and have a sharp bark like
      that of a dog. Called also prairie marmot.

   Prairie grouse. Same as Prairie chicken, above.

   Prairie hare (Zool.), a large long-eared Western hare
      (Lepus campestris). See Jack rabbit, under 2d Jack.


   Prairie hawk, Prairie falcon (Zool.), a falcon of Western
      North America (Falco Mexicanus). The upper parts are
      brown. The tail has transverse bands of white; the under
      parts, longitudinal streaks and spots of brown.

   Prairie hen. (Zool.) Same as Prairie chicken, above.

   Prairie itch (Med.), an affection of the skin attended with
      intense itching, which is observed in the Northern and
      Western United States; -- also called swamp itch,
      winter itch.

   Prairie marmot. (Zool.) Same as Prairie dog, above.

   Prairie mole (Zool.), a large American mole (Scalops
      argentatus), native of the Western prairies.

   Prairie pigeon, Prairie plover, or Prairie snipe
      (Zool.), the upland plover. See Plover, n., 2.

   Prairie rattlesnake (Zool.), the massasauga.

   Prairie snake (Zool.), a large harmless American snake
      (Masticophis flavigularis). It is pale yellow, tinged
      with brown above.

   Prairie squirrel (Zool.), any American ground squirrel of
      the genus Spermophilus, inhabiting prairies; -- called
      also gopher.

   Prairie turnip (Bot.), the edible turnip-shaped farinaceous
      root of a leguminous plant (Psoralea esculenta) of the
      Upper Missouri region; also, the plant itself. Called also
      pomme blanche, and pomme de prairie.

   Prairie warbler (Zool.), a bright-colored American warbler
      (Dendroica discolor). The back is olive yellow, with a
      group of reddish spots in the middle; the under parts and
      the parts around the eyes are bright yellow; the sides of
      the throat and spots along the sides, black; three outer
      tail feathers partly white.

   Prairie wolf. (Zool.) See Coyote.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

marmot \mar"mot\ (m[aum]r"m[o^]t; 277), n. [It. marmotta,
   marmotto, prob. fr. L. mus montanus, or mus montis, lit.,
   mountain mouse or rat. See Mountain, and Mouse.]
   1. (Zool.) Any rodent of the genus Marmota (formerly
      Arctomys) of the subfamily Sciurinae. The common
      European marmot (Marmota marmotta) is about the size of
      a rabbit, and inhabits the higher regions of the Alps and
      Pyrenees. The bobac is another European species. The
      common American species (Marmota monax) is the
      woodchuck (also called groundhog), but the name marmot
      is usually used only for the western variety.
      [1913 Webster +PJC]

   2. Any one of several species of ground squirrels or gophers
      of the genus Spermophilus; also, the prairie dog.
      [1913 Webster]

   Marmot squirrel (Zool.), a ground squirrel or spermophile.


   Prairie marmot. See Prairie dog.
      [1913 Webster]

WordNet (r) 3.0 (2006):

prairie marmot
    n 1: any of several rodents of North American prairies living in
         large complex burrows having a barking cry [syn: prairie
         dog, prairie marmot]