Source : Webster's Revised Unabridged Dictionary (1913)

   2. (Zo["o]l.) A scaup duck. See below.

   {Scaup duck} (Zo["o]l.), 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 ({A. affinis}),
      called also {little bluebill}, {river broadbill}, and
      {shuffler}; the tufted, or ring-necked, scaup duck ({A.
      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 ({A. marila}), closely
      resembles the American variety.

Raft \Raft\, n. [Originally, a rafter, spar, and fr. Icel. raptr
   a rafter; akin to Dan. raft, Prov. G. raff a rafter, spar;
   cf. OHG. r[=a]fo, r[=a]vo, a beam, rafter, Icel. r[=a]f roof.
   Cf. {Rafter}, n.]
   1. A collection of logs, boards, pieces of timber, or the
      like, fastened, together, either for their own collective
      conveyance on the water, or to serve as a support in
      conveying other things; a float.

   2. A collection of logs, fallen trees, etc. (such as is
      formed in some Western rivers of the United States), which
      obstructs navigation. [U.S.]

   3. [Perhaps akin to raff a heap.] A large collection of
      people or things taken indiscriminately. [Slang, U. S.]
      ``A whole raft of folks.'' --W. D. Howells.

   {Raft bridge}.
      (a) A bridge whose points of support are rafts.
      (b) A bridge that consists of floating timbers fastened
          together.

   {Raft duck}. [The name alludes to its swimming in dense
      flocks.] (Zo["o]l.)
      (a) The bluebill, or greater scaup duck; -- called also
          {flock duck}. See {Scaup}.
      (b) The redhead.

   {Raft port} (Naut.), a large, square port in a vessel's side
      for loading or unloading timber or other bulky articles; a
      timber or lumber port.