请输入您要查询的英文单词:

 

单词 feathers
释义

feathers


feath·er

F0061400 (fĕth′ər) n. 1. One of the light, flat structures growing from the skin 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. 3. Character, kind, or nature: Birds of a feather flock together. 4. a. A strip, wedge, or flange used as a strengthening part. b. A wedge or key that fits into a groove to make a joint. 5. The vane of an arrow. 6. A feather-shaped flaw, as in a precious stone. 7. The wake made by a submarine's periscope. 8. The act of feathering the blade of an oar in rowing. v. feath·ered, feath·er·ing, feath·ers v. tr. 1. To cover, dress, or decorate with feathers or featherlike projections. 2. To fit (an arrow) with a feather. 3. a. To thin, reduce, or fringe the edge of (wood, for example) by cutting, shaving, or making thinner. b. To spread (paint, for example) thinly at the edges so as to blend with the surrounding area. c. To shorten and taper (hair) by cutting and thinning. d. To blur or soften the edge of (an image). 4. To apply (a brake, throttle, or other control) gently or slightly and steadily. 5. To turn (an oar blade) almost horizontal as it is carried back after each stroke. 6. a. To alter the pitch of (a propeller) so that the chords of the blades are parallel with the line of flight. b. To alter the pitch of (the rotor of a helicopter) while in forward flight. 7. To turn off (an aircraft engine) while in flight. v. intr. 1. To grow feathers or become feathered. 2. To move, spread, or grow in a manner suggestive of feathers: "Steam feathered out from under the bathroom door" (Melinda Hayes). 3. To become thin or less dense at the edges: "That lipstick had feathered out in the corners of her mouth" (Erin McCarthy). 4. To feather an oar. 5. To feather a propeller. Idioms: feather in (one's) cap An act or deed to one's credit; a distinctive achievement. feather (one's) nest To grow wealthy by taking advantage of one's position or by making use of property or funds left in one's trust. in fine (or good or high) featherIn excellent form, health, or humor.
[Middle English fether, from Old English; see pet- in the Appendix of Indo-European roots.]

feathers

(ˈfɛðəz) pl n1. (Zoology) the plumage of a bird2. (Zoology) Also called: feathering the long hair on the legs or tail of certain breeds of horses and dogs3. informal dress; attire: her best feathers. 4. ruffle feathers to cause upset or offence
Translations
livrée
IdiomsSeefeather

feathers


feathers,

outgrowths of the skin, constituting the plumage of birds. Feathers grow only along certain definite tracts (pterylae), which vary in different groups of birds. Feathers develop from tiny projections of tissue (papillae) embedded in follicles and nourished by blood vessels in the dermis. When the feather is full grown, the blood supply is discontinued and the central shaft becomes hollow. A secretion of the thyroid gland stimulates the papilla to develop a new feather when one has been molted or pulled.

In a typical feather, barbs extend outward from the distal portion of the shaft, or rachis; smaller crosslinking barbules and hooks interlock neighboring barbs, forming a web that gives the feather both strength and flexibility. Down feathers, or plumulae, the first plumage of young birds and the protective undercoat of aquatic birds, lack these interlocking projections. Specialized feather forms are found in crests, top-knots, ruffs, and tail feathers. Bristles are modified feathers. The colors red, yellow, brown, and black are caused by pigment in the feathers. There are no blue pigments, and green and violet are rare; however, these colors, as well as iridescent effects, are caused by the reflection and diffraction of light.

Feathers are lightweight, durable, and in some cases waterproof. They have protective and decorative functions, but, aside from their role in bird flightflight,
sustained, self-powered motion through the air, as accomplished by an animal, aircraft, or rocket. Animal Flight

Adaptation for flight is highly developed in birds and insects. The bat is the only mammal that accomplishes true flight.
..... Click the link for more information.
, their most important capacity is heat retention. Feathers are believed to have evolved from reptilian scales in Mesozoic times, but little is definitely known about how they arose, and the feathers of ArchaeopteryxArchaeopteryx
[Gr.,=primitive wing], a 150 million-year-old fossil animal first discovered in 1860 in the late Jurassic limestone of Solnhofen, Bavaria, and described the following year.
..... Click the link for more information.
 and other early birds may have been too weak to be useful for flight. A number of feathered dinosaurs are known from the fossil record; one, Yutyrannus huali, was quite large (30 ft/9 m long) and had filamentlike feathers.

Feathers have been used by humans from ancient times for millinery and other ornamental purposes. The indiscriminate hunting of certain birds for their feathers has resulted in their near extinction; it is now prohibited by law in the United States.

Bibliography

See T. Hanson, Feathers (2011).

feathers


feathers

A cluster of fine bubbles or particles commonly arising from foreign material or from a fold in the glass in a molten or plastic state (British Standard).
随便看

 

英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2025/1/31 3:24:30