DICT.TW Dictionary Taiwan

 Po·lar a.
 1. Of or pertaining to one of the poles of the earth, or of a sphere; situated near, or proceeding from, one of the poles; as, polar regions; polar seas; polar winds.
 2. Of or pertaining to the magnetic pole, or to the point to which the magnetic needle is directed.
 3. Geom. Pertaining to, reckoned from, or having a common radiating point; as, polar coordinates.
 Polar axis, that axis of an astronomical instrument, as an equatorial, which is parallel to the earths axis.
 Polar bear Zool., a large bear (Ursus maritimus syn. Thalarctos maritimus) inhabiting the arctic regions.  It sometimes measures nearly nine feet in length and weighs 1,600 pounds.  It is partially amphibious, very powerful, and the most carnivorous of all the bears.  The fur is white, tinged with yellow.  Called also White bear. See Bear.
 Polar body, Polar cell, or Polar globule Biol., a minute cell which separates by karyokinesis from the ovum during its maturation.  In the maturation of ordinary ova two polar bodies are formed, but in parthogenetic ova only one.  The first polar body formed is usually larger than the second one, and often divides into two after its separation from the ovum.  Each of the polar bodies removes maternal chromatin from the ovum to make room for the chromatin of the fertilizing spermatozoon; but their functions are not fully understood.
 Polar circles Astron. & Geog., two circles, each at a distance from a pole of the earth equal to the obliquity of the ecliptic, or about 23° 28´, the northern called the arctic circle, and the southern the antarctic circle.
 Polar clock, a tube, containing a polarizing apparatus, turning on an axis parallel to that of the earth, and indicating the hour of the day on an hour circle, by being turned toward the plane of maximum polarization of the light of the sky, which is always 90° from the sun.
 Polar coordinates. See under 3d Coordinate.
 Polar dial, a dial whose plane is parallel to a great circle passing through the poles of the earth. --Math. Dict.
 Polar distance, the angular distance of any point on a sphere from one of its poles, particularly of a heavenly body from the north pole of the heavens.
 Polar equation of a line or Polar equation of a surface, an equation which expresses the relation between the polar coordinates of every point of the line or surface.
 Polar forces Physics, forces that are developed and act in pairs, with opposite tendencies or properties in the two elements, as magnetism, electricity, etc.
 Polar hare Zool., a large hare of Arctic America (Lepus arcticus), which turns pure white in winter.  It is probably a variety of the common European hare (Lepus timidus).
 Polar lights, the aurora borealis or australis.
 Polar opposition, or Polaric opposition or Polar contrast or Polaric contrast Logic, an opposition or contrast made by the existence of two opposite conceptions which are the extremes in a species, as white and black in colors; hence, as great an opposition or contrast as possible.
 Polar projection. See under Projection.
 Polar spherical triangle Spherics, a spherical triangle whose three angular points are poles of the sides of a given triangle. See 4th Pole, 2.
 Polar whale Zool., the right whale, or bowhead. See Whale.

 White a. [Compar. Whiter superl. Whitest.]
 1. Reflecting to the eye all the rays of the spectrum combined; not tinted with any of the proper colors or their mixtures; having the color of pure snow; snowy; -- the opposite of black or dark; as, white paper; a white skin.  “Pearls white.”
    White as the whitest lily on a stream.   --Longfellow.
 2. Destitute of color, as in the cheeks, or of the tinge of blood color; pale; pallid; as, white with fear.
 Or whispering with white lips, “The foe!
 They come! they come!”   --Byron.
 3. Having the color of purity; free from spot or blemish, or from guilt or pollution; innocent; pure.
    White as thy fame, and as thy honor clear.   --Dryden.
    No whiter page than Addison's remains.   --Pope.
 4. Gray, as from age; having silvery hair; hoary.
 Your high engendered battles 'gainst a head
 So old and white as this.   --Shak.
 5. Characterized by freedom from that which disturbs, and the like; fortunate; happy; favorable.
    On the whole, however, the dominie reckoned this as one of the white days of his life.   --Sir W. Scott.
 6. Regarded with especial favor; favorite; darling.
    Come forth, my white spouse.   --Chaucer.
    I am his white boy, and will not be gullet.   --Ford.
 Note: ☞ White is used in many self-explaining compounds, as white-backed, white-bearded, white-footed.
 White alder. Bot. See Sweet pepper bush, under Pepper.
 White ant Zool., any one of numerous species of social pseudoneuropterous insects of the genus Termes. These insects are very abundant in tropical countries, and form large and complex communities consisting of numerous asexual workers of one or more kinds, of large-headed asexual individuals called soldiers, of one or more queens (or fertile females) often having the body enormously distended by the eggs, and, at certain seasons of numerous winged males, together with the larvae and pupae of each kind in various stages of development. Many of the species construct large and complicated nests, sometimes in the form of domelike structures rising several feet above the ground and connected with extensive subterranean galleries and chambers. In their social habits they closely resemble the true ants. They feed upon animal and vegetable substances of various kinds, including timber, and are often very destructive to buildings and furniture.
 White arsenic Chem., arsenious oxide, As2O3, a substance of a white color, and vitreous adamantine luster, having an astringent, sweetish taste. It is a deadly poison.
 White bass Zool., a fresh-water North American bass (Roccus chrysops) found in the Great Likes.
 White bear Zool., the polar bear.  See under Polar.
 White blood cell. Physiol. See Leucocyte.
 White brand Zool., the snow goose.
 White brass, a white alloy of copper; white copper.
 White campion. Bot. (a) A kind of catchfly (Silene stellata) with white flowers. (b) A white-flowered Lychnis (Lychnis vespertina).
 White canon R. C. Ch., a Premonstratensian.
 White caps, the members of a secret organization in various of the United States, who attempt to drive away or reform obnoxious persons by lynch-law methods. They appear masked in white.  Their actions resembled those of the Ku Klux Klan in some ways but they were not formally affiliated with the Klan, and their victims were often not black.
 White cedar Bot., an evergreen tree of North America (Thuja occidentalis), also the related Cupressus thyoides, or Chamaecyparis sphaeroidea, a slender evergreen conifer which grows in the so-called cedar swamps of the Northern and Atlantic States.  Both are much valued for their durable timber.  In California the name is given to the Libocedrus decurrens, the timber of which is also useful, though often subject to dry rot. --Goodale. The white cedar of Demerara, Guiana, etc., is a lofty tree (Icica altissima syn. Bursera altissima) whose fragrant wood is used for canoes and cabinetwork, as it is not attacked by insect.
 White cell. Physiol. See Leucocyte.
 White cell-blood Med., leucocythaemia.
 White clover Bot., a species of small perennial clover bearing white flowers. It furnishes excellent food for cattle and horses, as well as for the honeybee.  See also under Clover.
 White copper, a whitish alloy of copper.  See German silver, under German.
 White copperas Min., a native hydrous sulphate of iron; coquimbite.
 White coral Zool., an ornamental branched coral (Amphihelia oculata) native of the Mediterranean.
 White corpuscle. Physiol. See Leucocyte.
 White cricket Zool., the tree cricket.
 White crop, a crop of grain which loses its green color, or becomes white, in ripening, as wheat, rye, barley, and oats, as distinguished from a green crop, or a root crop.
 White currant Bot., a variety of the common red currant, having white berries.
 White daisy Bot., the oxeye daisy.  See under Daisy.
 White damp, a kind of poisonous gas encountered in coal mines. --Raymond.
 White elephant Zool., (a) a whitish, or albino, variety of the Asiatic elephant. (b) see white elephant in the vocabulary.
 White elm Bot., a majestic tree of North America (Ulmus Americana), the timber of which is much used for hubs of wheels, and for other purposes.
 White ensign. See Saint George's ensign, under Saint.
 White feather, a mark or symbol of cowardice.  See To show the white feather, under Feather, n.
 White fir Bot., a name given to several coniferous trees of the Pacific States, as Abies grandis, and Abies concolor.
 White flesher Zool., the ruffed grouse.  See under Ruffed. [Canada]
 White frost. See Hoarfrost.
 White game Zool., the white ptarmigan.
 White garnet Min., leucite.
 White grass Bot., an American grass (Leersia Virginica) with greenish-white paleae.
 White grouse. Zool. (a) The white ptarmigan. (b) The prairie chicken. [Local, U. S.]
 White grub Zool., the larva of the June bug and other allied species. These grubs eat the roots of grasses and other plants, and often do much damage.
 White hake Zool., the squirrel hake.  See under Squirrel.
 White hawk, or White kite Zool., the hen harrier.
 White heat, the temperature at which bodies become incandescent, and appear white from the bright light which they emit.
 White hellebore Bot., a plant of the genus Veratrum (Veratrum album) See Hellebore, 2.
 White herring, a fresh, or unsmoked, herring, as distinguished from a red, or cured, herring. [R.] --Shak.
 White hoolet Zool., the barn owl. [Prov. Eng.]
 White horses Naut., white-topped waves; whitecaps.
 The White House. See under House.
 White ibis Zool., an American ibis (Guara alba) having the plumage pure white, except the tips of the wings, which are black. It inhabits tropical America and the Southern United States. Called also Spanish curlew.
 White iron. (a) Thin sheets of iron coated with tin; tinned iron. (b) A hard, silvery-white cast iron containing a large proportion of combined carbon.
 White iron pyrites Min., marcasite.
 White land, a tough clayey soil, of a whitish hue when dry, but blackish after rain. [Eng.]
 White lark Zool., the snow bunting.
 White lead. (a) A carbonate of lead much used in painting, and for other purposes; ceruse. (b) Min. Native lead carbonate; cerusite.
 White leather, buff leather; leather tanned with alum and salt.
 White leg Med., milk leg.  See under Milk.
 White lettuce Bot., rattlesnake root.  See under Rattlesnake.
 White lie. See under Lie.
 White light. (a) Physics Light having the different colors in the same proportion as in the light coming directly from the sun, without having been decomposed, as by passing through a prism.  See the Note under Color, n., 1. (b) A kind of firework which gives a brilliant white illumination for signals, etc.
 White lime, a solution or preparation of lime for whitewashing; whitewash.
 White line Print., a void space of the breadth of a line, on a printed page; a blank line.
 White meat. (a) Any light-colored flesh, especially of poultry. (b) Food made from milk or eggs, as butter, cheese, etc.
    Driving their cattle continually with them, and feeding only upon their milk and white meats.   --Spenser.
 -- White merganser Zool., the smew.
 White metal. (a) Any one of several white alloys, as pewter, britannia, etc. (b) Metal. A fine grade of copper sulphide obtained at a certain stage in copper smelting.
 White miller. Zool. (a) The common clothes moth. (b) A common American bombycid moth (Spilosoma Virginica) which is pure white with a few small black spots; -- called also ermine moth, and virgin moth.  See Woolly bear, under Woolly.
 White money, silver money.
 White mouse Zool., the albino variety of the common mouse.
 White mullet Zool., a silvery mullet (Mugil curema) ranging from the coast of the United States to Brazil; -- called also blue-back mullet, and liza.
 White nun Zool., the smew; -- so called from the white crest and the band of black feathers on the back of its head, which give the appearance of a hood.
 White oak. Bot. See under Oak.
 White owl. Zool. (a) The snowy owl. (b) The barn owl.
 White partridge Zool., the white ptarmigan.
 White perch. Zool. (a) A North American fresh-water bass (Morone Americana) valued as a food fish. (b) The croaker, or fresh-water drum. (c) Any California surf fish.
 White pine. Bot. See the Note under Pine.
 White poplar Bot., a European tree (Populus alba) often cultivated as a shade tree in America; abele.
 White poppy Bot., the opium-yielding poppy.  See Poppy.
 White powder, a kind of gunpowder formerly believed to exist, and to have the power of exploding without noise. [Obs.]
    A pistol charged with white powder.   --Beau. & Fl.
 -- White precipitate. Old Chem. See under Precipitate.
 White rabbit. Zool. (a) The American northern hare in its winter pelage. (b) An albino rabbit.
 White rent, (a) Eng. Law Formerly, rent payable in silver; -- opposed to black rent.  See Blackmail, n., 3. (b) A rent, or duty, of eight pence, payable yearly by every tinner in Devon and Cornwall to the Duke of Cornwall, as lord of the soil. [Prov. Eng.]
 White rhinoceros. Zool. (a) The one-horned, or Indian, rhinoceros (Rhinoceros Indicus).  See Rhinoceros. (b) The umhofo.
 White ribbon, the distinctive badge of certain organizations for the promotion of temperance or of moral purity; as, the White-ribbon Army.
 White rope Naut., untarred hemp rope.
 White rot. Bot. (a) Either of several plants, as marsh pennywort and butterwort, which were thought to produce the disease called rot in sheep. (b) A disease of grapes.  See White rot, under Rot.
 White sage Bot., a white, woolly undershrub (Eurotia lanata) of Western North America; -- called also winter fat.
 White salmon Zool., the silver salmon.
 White salt, salt dried and calcined; decrepitated salt.
 White scale Zool., a scale insect (Aspidiotus Nerii) injurious to the orange tree.  See Orange scale, under Orange.
 White shark Zool., a species of man-eating shark. See under Shark.
 White softening. Med. See Softening of the brain, under Softening.
 White spruce. Bot. See Spruce, n., 1.
 White squall Naut., a sudden gust of wind, or furious blow, which comes up without being marked in its approach otherwise than by whitecaps, or white, broken water, on the surface of the sea.
 White staff, the badge of the lord high treasurer of England. --Macaulay.
 White stork Zool., the common European stork.
 White sturgeon. Zool. See Shovelnose (d).
 White sucker. Zool. (a) The common sucker. (b) The common red horse (Moxostoma macrolepidotum).
 White swelling Med., a chronic swelling of the knee, produced by a strumous inflammation of the synovial membranes of the kneejoint and of the cancellar texture of the end of the bone forming the kneejoint; -- applied also to a lingering chronic swelling of almost any kind.
 White tombac. See Tombac.
 White trout Zool., the white weakfish, or silver squeteague (Cynoscion nothus), of the Southern United States.
 White vitriol Chem., hydrous sulphate of zinc.  See White vitriol, under Vitriol.
 White wagtail Zool., the common, or pied, wagtail.
 White wax, beeswax rendered white by bleaching.
 White whale Zool., the beluga.
 White widgeon Zool., the smew.
 White wine. any wine of a clear, transparent color, bordering on white, as Madeira, sherry, Lisbon, etc.; -- distinguished from wines of a deep red color, as port and Burgundy.  “White wine of Lepe.” --Chaucer.
 White witch, a witch or wizard whose supernatural powers are supposed to be exercised for good and beneficent purposes. --Addison.  --Cotton Mather.
 White wolf. Zool. (a) A light-colored wolf (Canis laniger) native of Thibet; -- called also chanco, golden wolf, and Thibetan wolf. (b) The albino variety of the gray wolf.
 White wren Zool., the willow warbler; -- so called from the color of the under parts.