From The Collaborative International Dictionary of English v.0.48 [gcide]:
Scaup \Scaup\ (sk[add]p), 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]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Blackhead \Black"head`\, n. (Zool.)
The scaup duck.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
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]
From WordNet (r) 3.0 (2006) [wn]:
blackhead
n 1: a black-tipped plug clogging a pore of the skin [syn:
{blackhead}, {comedo}]
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