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

scaup \scaup\ skaddp, n. see scalp a bed of oysters or
   mussels.
   1. a bed or stratum of shellfish; scalp. scot.
      1913 webster

   2. zool. a scaup duck. see below.
      1913 webster

   scaup duck zool., any one of several species of northern
      ducks of the genus aythya, or fuligula. the adult
      males are, in large part, black. the three north american
      species are: the greater scaup duck aythya marila, var.
      nearctica, called also broadbill, bluebill,
      blackhead, flock duck, flocking fowl, and raft
      duck; the lesser scaup duck aythya affinis, called
      also little bluebill, river broadbill, and shuffler;
      the tufted, or ring-necked, scaup duck aythya
      collaris, called also black jack, ringneck,
      ringbill, ringbill shuffler, etc. see illust. of
      ring-necked duck, under ring-necked. the common
      european scaup, or mussel, duck aythya marila, closely
      resembles the american variety.
      1913 webster
see also:
scalp scaup duck aythya fuligula aythya marila broadbill 
bluebill blackhead flock duck flocking fowl raft duck 
aythya affinis little bluebill river broadbill shuffler aythya collaris 
black jack ringneck ringbill ringbill shuffler ring-necked duck 
ring-necked 

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

broadbill \broad"bill`\, n.
   1. zool. a wild duck aythya marila, or fuligula
      marila, which appears in large numbers on the eastern
      coast of the united states, in autumn; -- called also
      bluebill, blackhead, raft duck, and scaup duck.
      see scaup duck.
      1913 webster

   2. zool. the shoveler. see shoveler.
      1913 webster
see also:
aythya marila fuligula marila bluebill blackhead raft duck scaup duck 
scaup duck shoveler 

[3] : WordNet (r) 2.0

scaup duck
     n : diving ducks of north america having a bluish-gray bill
         syn: scaup, bluebill, broadbill
see also:
scaup bluebill broadbill 

Scaup >> S Words
Scaup, definition of term: Scaup
scaup_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