View your list of saved words. (You can log in using Facebook.)
About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.
Definition of FEATHER
a: any of the light horny epidermal outgrowths that form the external covering of the body of birds and that consist of a shaft bearing on each side a series of barbs which bear barbules which in turn bear barbicels commonly ending in hooked hamuli and interlocking with the barbules of an adjacent barb to link the barbs into a continuous vane
b: to cover, clothe, or adorn with or as if with feathers
a: to turn (an oar blade) almost horizontal when lifting from the water at the end of a stroke to reduce air resistance
b (1): to change the angle of (airplane propeller blades) so that the chords become approximately parallel to the line of flight; also: to change the angle of airplane propeller blades of (an engine) in such a manner (2): to change the angle of (a rotor blade of a rotorcraft) periodically in forward flight
river 100 miles (161 kilometers) N cen California flowing S into Sacramento River
Medical Definition of FEATHER
: one of the light horny epidermal outgrowths that form the external covering of the body of birds and that consist of a shaft bearing on each side a series of barbs which bear barbules which in turn bear barbicels commonly ending in the hooked processes and interlocking with the barbules of an adjacent barb to link the barbs into a continuous vane
Component structure of the outer covering and flight surfaces of all modern birds. Unique to birds, feathers apparently evolved from the scales of birds' reptilian ancestors. Like hair, feathers are made of keratin, a fibrous protein. They are variously specialized for insulation, flight, formation of body contours, display, and sensory reception. Contour feathers form most of the surface of the bird, streamlining it for flight and often waterproofing it. The basal portion may be downy and thus act as insulation. The major contour feathers of the wing (remiges) and tail (rectrices) function in flight. Contour feathers grow in tracts (pterylae) separated by bare areas (apteria) and develop from follicles in the skin. Down feathers have loose-webbed barbs, all rising from the tip of a very short shaft. Their function is insulation, and they may be found in both pterylae and apteria in adult birds. They also constitute the first feather coat of most young birds. Filoplumes are hairlike feathers with a few soft barbs near the tip. They are associated with contour feathers and may be sensory or decorative in function. Bristlelike, vaneless feathers occur around the mouth, eyes, and nostrils of birds. Some bristles function as eyelashes on ground-dwelling birds; bristles over the nostrils may serve as filters.