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

ruddy \rud"dy\, a. compar. ruddier; superl. ruddiest. as.
   rudig. see rud, n.
   1. of a red color; red, or reddish; as, a ruddy sky; a ruddy
      flame. --milton.
      1913 webster

            they were more ruddy in body than rubies. --lam. iv.
                                                  7.
      1913 webster

   2. of a lively flesh color, or the color of the human skin in
      high health; as, ruddy cheeks or lips. --dryden.
      1913 webster

   ruddy duck zool., an american duck erismatura rubida
      having a broad bill and a wedge-shaped tail composed of
      stiff, sharp feathers. the adult male is rich brownish red
      on the back, sides, and neck, black on the top of the
      head, nape, wings, and tail, and white on the cheeks. the
      female and young male are dull brown mixed with blackish
      on the back; grayish below. called also dunbird,
      dundiver, ruddy diver, stifftail, spinetail,
      hardhead, sleepy duck, fool duck, spoonbill, etc.
      

   ruddy plover zool. the sanderling.
      1913 webster
see also:
ruddier ruddiest rud ruddy duck erismatura rubida dunbird 
dundiver ruddy diver stifftail spinetail hardhead 
sleepy duck fool duck spoonbill ruddy plover 

[2] : WordNet (r) 2.0

ruddy duck
     n : reddish-brown stiff-tailed duck of north america and
         northern south america syn: oxyura jamaicensis
see also:
oxyura jamaicensis 

Ruddy >> R Words
Ruddy, definition of term: Ruddy
ruddy_pag1.html

Duck >> D Words
Duck, definition of term: Duck
duck_pag1.html

Duck Soup >> D Words
Duck Soup, definition of term: Duck Soup
duck+soup_pag1.html

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

Wood Duck >> W Words
Wood Duck, definition of term: Wood Duck
wood+duck_pag1.html

Fen Duck >> F Words
Fen Duck, definition of term: Fen Duck
fen+duck_pag1.html

Dabbling Duck >> D Words
Dabbling Duck, definition of term: Dabbling Duck
dabbling+duck_pag1.html

Bombay Duck >> B Words
Bombay Duck, definition of term: Bombay Duck
bombay+duck_pag1.html

Lame Duck >> L Words
Lame Duck, definition of term: Lame Duck
lame+duck_pag1.html