feather

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feather

(fĕth′ər)
n.
1. One of the light, flat growths forming the plumage of birds, consisting of numerous slender, closely arranged parallel barbs forming a vane on either side of a horny, tapering, partly hollow shaft.
2. A feathery tuft or fringe of hair, as on the legs or tail of some dogs.
v.intr.
To grow feathers or become feathered.

feather

any of the flat light waterproof epidermal structures forming the plumage of birds, several types of which form the body covering of birds. The principal types of feather are remex (wing feather); rectrice (tail feather); CONTOUR FEATHER (covering the outside of the bird); DOWN (the soft covering to the body); filoplume (hairlike feathers bearing a few barbs at the apex, occurring between the contour feathers). Feathers consist of a central RACHIS that supports BARBS which, except in down feathers, are connected to form a lamella by means of BARBULES. Feathers are now also known to have occurred in some Theropod DINOSAURS (Coelurosaurs) which have recently been excavated in China, and even Tyrannosaurus may have possessed feathers at some stage in its life cycle.

feather

1. skin appendages of all birds. Comprise a central shaft with a flat vane on either side. The shaft consists of the calamus, embedded in the feather follicle, and the rachis which is outside the follicle. The calamus has an opening at each end, the superior and inferior umbilicus. The inferior umbilicus contains the dermal papilla which produces the pulp which continues up the interior of the calamus to end at and pass out through the superior umbilicus. Each feather has two parts, the mainfeather and a small afterfeather which is attached at the superior umbilicus. Barbs and barbules form the bulk of the vane.
Contour feathers are large feathers that give the bird its shape. Down feathers are very small feathers. Semiplume feathers are intermediate in size between contour and down. Filoplume feathers are hairlike and remain after other feathers are plucked. They have only one small tuft of barbs. Specialized additional feathers include auricular feathers, around the ear lobes, oil gland feathers, at the oil gland on the tail, bristle feathers on the eyelids and powder feathers in aquatic birds. Remiges are the large flight feathers of the wing and rectrices the very long contour feathers coming from the side of the tail. These are the longest feathers of all in the domestic fowl.
The feather coat consists of feather tracts (see below) or pterylae that are well defined and carry contour feathers and semiplumes. They are separated by unfeathered tracts called apteria. The distribution of special feathers of particular colors in particular pterylae is what gives the breeds their distinctive appearance. The feather coat is divided up into regions that include hackle, cape, cushion, saddle, wing bars, wing fronts and wing bows.
2. long hairs on the fetlocks of draft breeds of horses and in dogs, on the ventral body, caudal aspect of the legs, and ventral tail of spaniels and setters.
3. hair-streams that produce feather-like marks, in the haircoat of an animal.

feather clipping
clipping the flight feathers with tin shears will prevent flight for several months.
feather coat
the total feather covering of a bird. Called also ptilosis.
contour feather
the externally visible feathers which determine the bird's silhouette and the contours of the wings, body and tail.
feather cushion
the plumage from the pelvic tract of the hen, forming the back cover.
feather cysts
contain unerupted feathers and keratinous debris that may form large cutaneous lumps.
feather disease
an idiopathic disease of all varieties of cockatoos, lovebirds and budgerigars as young birds and characterized by a chronic, progressive, symmetrical loss of feathers, elongation of toenails and upper beak, which later becomes necrotic and sloughs off. Called also psittacine beak and feather syndrome.
filoplume feather
hairlike feathers, commonest on neck, head.
flight feather
the strong feathers on the wings and tail of birds used in flight. Called also remiges (plural), remex (singular).
feather follicle
a small tubular invagination of the skin with a fleshy dermal papilla at the bottom from which the feather grows. The papilla is inserted in the opening at the end of the quill.
feather mites
mites that live on and in feathers, often in enormous numbers but have little pathogenicity. Include the genera of Analges and Megninia of the family Analgesidae and the genus Dermoglyphus of the family Dermoglyphidae. Other miscellaneous genera are Syringophilus, Falculifer, Freyana, Pterolichus, Pteronyssus.
feather muscles
similar to erector pili muscles of mammals; attached to the sides of the follicle; capable of elevating or lowering entire groups of feathers.
feather picking
a vice thought to be due to insecurity and manifested by the bird pecking off its own feathers. If blood is drawn cannibalism may develop.
primary feather
flight feathers on the wings of birds.
psittacine beak and feather disease
see psittacine beak and feather disease.
feather pulling
see feather picking (above).
feather pulp
remnants of vascular tissue contained in the core of each feather.
saddle feather
the plumage covering the back of male birds.
feather syndrome
see psittacine beak and feather disease.
feather tract
area of the skin of a bird in which feathers grow. They are well defined and separated by unfeathered areas called apteria.

Patient discussion about feather

Q. can you be allergic to goose feathers?? do you get an allergic reaction even through the pillow cover??? If not- I don't know what it is but something in my bed is giving me a rash...

A. i had a similar problem. i just couldn't sleep in my bed and every day i changed one thing to see what is the cause. then i found that one of the pillows causes it and probably from dust mites. you can easily be allergic to goose feathers that can pass through the pillow cover. all you have to do is replace it and see if something changed.

More discussions about feather
References in periodicals archive ?
Gawarrgay is a featherless emu, and the head in the Coalsack represents a big waterhole on Earth.
2009) assumed that the featherless ventral apteria found in individuals of these species initiating breeding in July and August suggested they had bred earlier someplace to the north.
To him I am just another hen, although very large and featherless.
Because Abbas, the featherless chicken, has suddenly turned into an eagle.
Hope floating, featherless and plucked, down the river.
The discovery also has implications for understanding how birds - including vultures - evolved to have featherless necks due to their metabolism of vitamin A selectively in neck skin.
The creatures have disturbing deformities -- a featherless parrot, conjoined monkeys, a python with legs, for instance -- but they have a common trait: heightened intelligence ( a given in all fictitious animals, from the shark in Jaws to Anaconda ).
At the time, veterinarians thought the featherless parrot had only six months to live, but she defied the odds.
Feathers wash off easily and featherless skins split quickly, leaving fresh meat on the table for Blackie, Goldilocks or Deadgrass.
Although there is a diphtheritic form of the disease in which lesions appear in mouth and upper respiratory tract, this form of disease is also associated with skin lesions on the featherless part of the body in some chickens.
Avigdor Cahaner presented in another session of the EPC his research on featherless broiler chicken; this trait that improves heat resistance has not been incorporated into commercial breeding programmes, as [probably because] consumer acceptance might be difficult.
But his career began with his story of Borka, the featherless goose, which is, paradoxically, extremely heart-warming.