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The Collaborative International Dictionary of English v.0.48 (gcide)

Beaver \Bea"ver\, n. [OE. bever, AS. beofer, befer; akin to D.
bever, OHG. bibar, G. biber, Sw. b[aum]fver, Dan. b[ae]ver,
Lith. bebru, Russ. bobr', Gael. beabhar, Corn. befer, L.
fiber, and Skr. babhrus large ichneumon; also as an adj.,
brown, the animal being probably named from its color.
[root]253. See {Brown}.]
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1. (Zool.) An amphibious rodent, of the genus {Castor}.
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Note: It has palmated hind feet, and a broad, flat tail. It
is remarkable for its ingenuity in constructing its
lodges or "houses," and dams across streams. It is
valued for its fur, and for the material called
{castor}, obtained from two small bags in the groin of
the animal. The European species is {Castor fiber}, and
the American is generally considered a variety of this,
although sometimes called {Castor Canadensis}.
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2. The fur of the beaver.
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3. A hat, formerly made of the fur of the beaver, but now
usually of silk.
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A brown beaver slouched over his eyes. --Prescott.
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4. Beaver cloth, a heavy felted woolen cloth, used chiefly
for making overcoats.
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5. A man's beard.
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6. The hair on a woman's pubic area; -- vulgar. [vulgar
slang]
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7. A woman; -- vulgar and offensive. [vulgar slang]
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8. A person who works enthusiastically and diligently; --
used especially in the phrase {eager beaver}. [informal]
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{Beaver rat} (Zool.), an aquatic ratlike quadruped of
Tasmania ({Hydromys chrysogaster}).

{Beaver skin}, the furry skin of the beaver.

{Bank beaver}. See under 1st {Bank}.
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Castor \Cas"tor\, n. [L. castor the beaver, Gr. ?; of uncertain
origin.]
1. (Zool.) A genus of rodents, including the beaver. See
{Beaver}.
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2. Castoreum. See {Castoreum}.
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3. A hat, esp. one made of beaver fur; a beaver.
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I have always been known for the jaunty manner in
which I wear my castor. --Sir W.
Scott.
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4. A heavy quality of broadcloth for overcoats.
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Castor \Cast"or\, n.
See {Caster}, a small wheel.
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Castor \Cas"tor\, n. [L.] (Astron.)
the northernmost of the two bright stars in the constellation
Gemini, the other being Pollux.
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Castor \Cas"tor\, Castorite \Cas"tor*ite\, n. [The minerals
castor and pollux were so named because found together on the
island of Elba. See {Castor and Pollux}.] (Min.)
A variety of the mineral called petalite, from Elba.
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