beaver

n. large semiaquatic rodent; fur pelt from this animal; costly felt hat made from felted beaver fur

Beavers are semi-aquatic rodents native to North America and Europe. They are the only living members of the family Castoridae, which contains a single genus, Castor. Genetic research has shown the European and North American beaver populations to be distinct species and that hybridization is unlikely.
See more at Wikipedia.org...

Noun
1. the soft brown fur of the beaver
(hypernym) fur, pelt
2. a full beard
(hypernym) beard, face fungus, whiskers
3. a man's hat with a tall crown; usually covered with beaver or silk
(synonym) dress hat, high hat, opera hat, silk hat, stovepipe, top hat, topper
(hypernym) hat, chapeau, lid
4. a movable piece of armor on a medieval helmet used to protect the lower face
(hypernym) armor plate, armour plate, armor plating, plate armor, plate armour
(part-holonym) helmet
5. a hat made of beaver fur or similar material
(synonym) castor
(hypernym) fur hat
6. large semiaquatic rodent with webbed hind feet and a broad flat tail; construct complex dams and underwater lodges
(hypernym) rodent, gnawer, gnawing animal
(hyponym) Old World beaver, Castor fiber
(member-holonym) Castor, genus Castor
(derivation) beaver away
Verb
1. work hard on something
(synonym) beaver away
(hypernym) work

(n.)
The fur of the beaver.
  

(n.)
That piece of armor which protected the lower part of the face, whether forming a part of the helmet or fixed to the breastplate. It was so constructed (with joints or otherwise) that the wearer could raise or lower it to eat and drink.
  

(n.)
Beaver cloth, a heavy felted woolen cloth, used chiefly for making overcoats.
  

(n.)
An amphibious rodent, of the genus Castor.
  

(n.)
A hat, formerly made of the fur of the beaver, but now usually of silk.
  

[Native American] The beaver origin is based on the discovery of a grief stricken father that his family, lost in a river, were changed into beavers. He was pulled into the water and was likewise changed.