[1] : The Collaborative International Dictionary of English v.0.48

steamer \steam"er\ -~er, n.
   1. a vessel propelled by steam; a steamship or steamboat.
      1913 webster

   2. a steam fire engine. see under steam.
      1913 webster

   3. a road locomotive for use on common roads, as in
      agricultural operations.
      1913 webster

   4. a vessel in which articles are subjected to the action of
      steam, as in washing, in cookery, and in various processes
      of manufacture.
      1913 webster

   5. zool. the steamer duck.
      1913 webster

   steamer duck zool., a sea duck tachyeres cinereus,
      native of patagonia and terra del fuego, which swims and
      dives with great agility, but which, when full grown, is
      incapable of flight, owing to its very small wings. called
      also loggerhead, race horse, and side-wheel duck.
      1913 webster
see also:
steam steamer duck tachyeres cinereus loggerhead race horse side-wheel duck 

[2] : WordNet (r) 2.0

steamer
     n 1: a clam that is usually steamed in the shell syn: soft-shell
          clam, steamer clam, long-neck clam
     2: a cooking utensil that can be used to cook food by steaming
        it
     3: a ship powered by one or more steam engines syn: steamship
     4: an edible clam with thin oval-shaped shell found in coastal
        regions of the united states and europe syn: soft-shell
        clam, steamer clam, long-neck clam, mya arenaria
see also:
soft-shell clam steamer clam long-neck clam steamship soft-shell clam mya arenaria 

[3] : Moby Thesaurus II by Grady Ward, 1.0

26 moby thesaurus words for "steamer":
   dungeness crab, japanese crab, blue point, clam, coquillage, crab,
   crawdad, crawfish, crayfish, langouste, limpet, littleneck clam,
   lobster, mussel, oyster, periwinkle, prawn, quahog, scallop,
   shellfish, shrimp, snail, soft-shell crab, steamboat, steamship,
   whelk

Steamer >> S Words
Steamer, definition of term: Steamer
steamer_pag1.html

Steamer Duck >> S Words
Steamer Duck, definition of term: Steamer Duck
steamer+duck_pag1.html

Paddle Steamer >> P Words
Paddle Steamer, definition of term: Paddle Steamer
paddle+steamer_pag1.html