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Wordnet 3.0

NOUN (3)

1. caused by a flavivirus transmitted by a mosquito;
[syn: yellow jack, yellow fever, black vomit]

2. yellow flag hoist on a ship in quarantine;

3. fish of western Atlantic and Gulf of Mexico;
[syn: yellow jack, Caranx bartholomaei]


The Collaborative International Dictionary of English v.0.48:

Jack \Jack\ (j[a^]k), n. [F. Jacques James, L. Jacobus, Gr. ?, Heb. Ya 'aq[=o]b Jacob; prop., seizing by the heel; hence, a supplanter. Cf. Jacobite, Jockey.] [1913 Webster] 1. A familiar nickname of, or substitute for, John. [1913 Webster] You are John Rugby, and you are Jack Rugby. --Shak. [1913 Webster] 2. An impertinent or silly fellow; a simpleton; a boor; a clown; also, a servant; a rustic. "Jack fool." --Chaucer. [1913 Webster] Since every Jack became a gentleman, There 's many a gentle person made a Jack. --Shak. [1913 Webster] 3. A popular colloquial name for a sailor; -- called also Jack tar, and Jack afloat. [1913 Webster] 4. A mechanical contrivance, an auxiliary machine, or a subordinate part of a machine, rendering convenient service, and often supplying the place of a boy or attendant who was commonly called Jack; as: (a) A device to pull off boots. (b) A sawhorse or sawbuck. (c) A machine or contrivance for turning a spit; a smoke jack, or kitchen jack. (b) (Mining) A wooden wedge for separating rocks rent by blasting. (e) (Knitting Machine) A lever for depressing the sinkers which push the loops down on the needles. (f) (Warping Machine) A grating to separate and guide the threads; a heck box. (g) (Spinning) A machine for twisting the sliver as it leaves the carding machine. (h) A compact, portable machine for planing metal. (i) A machine for slicking or pebbling leather. (k) A system of gearing driven by a horse power, for multiplying speed. (l) A hood or other device placed over a chimney or vent pipe, to prevent a back draught. (m) In the harpsichord, an intermediate piece communicating the action of the key to the quill; -- called also hopper. (n) In hunting, the pan or frame holding the fuel of the torch used to attract game at night; also, the light itself. --C. Hallock. [1913 Webster] 5. A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body such as an automobile through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, capstan bar, etc. The name is often given to a jackscrew, which is a kind of jack. [1913 Webster] 6. The small bowl used as a mark in the game of bowls. --Shak. [1913 Webster] Like an uninstructed bowler who thinks to attain the jack by delivering his bowl straight forward upon it. --Sir W. Scott. [1913 Webster] 7. The male of certain animals, as of the ass. [1913 Webster] 8. (Zool.) (a) A young pike; a pickerel. (b) The jurel. (c) A large, California rock fish (Sebastodes paucispinus); -- called also boccaccio, and m['e]rou. (d) The wall-eyed pike. [1913 Webster] 9. A drinking measure holding half a pint; also, one holding a quarter of a pint. [Prov. Eng.] --Halliwell. [1913 Webster] 10. (Naut.) (a) A flag, containing only the union, without the fly, usually hoisted on a jack staff at the bowsprit cap; -- called also union jack. The American jack is a small blue flag, with a star for each State. (b) A bar of iron athwart ships at a topgallant masthead, to support a royal mast, and give spread to the royal shrouds; -- called also jack crosstree. --R. H. Dana, Jr. [1913 Webster] 11. The knave of a suit of playing cards. 12. (pl.) A game played with small (metallic, with tetrahedrally oriented spikes) objects (the jacks(1950+), formerly jackstones) that are tossed, caught, picked up, and arranged on a horizontal surface in various patterns; in the modern American game, the movements are accompanied by tossing or bouncing a rubber ball on the horizontal surface supporting the jacks. same as jackstones. [PJC] 13. Money. [slang] [PJC] 14. Apple jack. [PJC] 15. Brandy. [PJC] Note: Jack is used adjectively in various senses. It sometimes designates something cut short or diminished in size; as, a jack timber; a jack rafter; a jack arch, etc. [1913 Webster] Jack arch, an arch of the thickness of one brick. Jack back (Brewing & Malt Vinegar Manuf.), a cistern which receives the wort. See under 1st Back. Jack block (Naut.), a block fixed in the topgallant or royal rigging, used for raising and lowering light masts and spars. Jack boots, boots reaching above the knee; -- worn in the 17 century by soldiers; afterwards by fishermen, etc. Jack crosstree. (Naut.) See 10, b, above. Jack curlew (Zool.), the whimbrel. Jack frame. (Cotton Spinning) See 4 (g), above. Jack Frost, frost or cold weather personified as a mischievous person. Jack hare, a male hare. --Cowper. Jack lamp, a lamp for still hunting and camp use. See def. 4 (n.), above. Jack plane, a joiner's plane used for coarse work. Jack post, one of the posts which support the crank shaft of a deep-well-boring apparatus. Jack pot (Poker Playing), the name given to the stakes, contributions to which are made by each player successively, till such a hand is turned as shall take the "pot," which is the sum total of all the bets. See also jackpot. Jack rabbit (Zool.), any one of several species of large American hares, having very large ears and long legs. The California species (Lepus Californicus), and that of Texas and New Mexico (Lepus callotis), have the tail black above, and the ears black at the tip. They do not become white in winter. The more northern prairie hare (Lepus campestris) has the upper side of the tail white, and in winter its fur becomes nearly white. Jack rafter (Arch.), in England, one of the shorter rafters used in constructing a hip or valley roof; in the United States, any secondary roof timber, as the common rafters resting on purlins in a trussed roof; also, one of the pieces simulating extended rafters, used under the eaves in some styles of building. Jack salmon (Zool.), the wall-eyed pike, or glasseye. Jack sauce, an impudent fellow. [Colloq. & Obs.] Jack shaft (Mach.), the first intermediate shaft, in a factory or mill, which receives power, through belts or gearing, from a prime mover, and transmits it, by the same means, to other intermediate shafts or to a line shaft. Jack sinker (Knitting Mach.), a thin iron plate operated by the jack to depress the loop of thread between two needles. Jack snipe. (Zool.) See in the Vocabulary. Jack staff (Naut.), a staff fixed on the bowsprit cap, upon which the jack is hoisted. Jack timber (Arch.), any timber, as a rafter, rib, or studding, which, being intercepted, is shorter than the others. Jack towel, a towel hung on a roller for common use. Jack truss (Arch.), in a hip roof, a minor truss used where the roof has not its full section. Jack tree. (Bot.) See 1st Jack, n. Jack yard (Naut.), a short spar to extend a topsail beyond the gaff. [1913 Webster] Blue jack, blue vitriol; sulphate of copper. Hydraulic jack, a jack used for lifting, pulling, or forcing, consisting of a compact portable hydrostatic press, with its pump and a reservoir containing a supply of liquid, as oil. Jack-at-a-pinch. (a) One called upon to take the place of another in an emergency. (b) An itinerant parson who conducts an occasional service for a fee. Jack-at-all-trades, one who can turn his hand to any kind of work. Jack-by-the-hedge (Bot.), a plant of the genus Erysimum (Erysimum alliaria, or Alliaria officinalis), which grows under hedges. It bears a white flower and has a taste not unlike garlic. Called also, in England, sauce-alone. --Eng. Cyc. Jack-in-office, an insolent fellow in authority. --Wolcott. Jack-in-the-bush (Bot.), a tropical shrub with red fruit (Cordia Cylindrostachya). Jack-in-the-green, a chimney sweep inclosed in a framework of boughs, carried in Mayday processions. Jack-of-the-buttery (Bot.), the stonecrop (Sedum acre). Jack-of-the-clock, a figure, usually of a man, on old clocks, which struck the time on the bell. Jack-on-both-sides, one who is or tries to be neutral. Jack-out-of-office, one who has been in office and is turned out. --Shak. Jack the Giant Killer, the hero of a well-known nursery story. Yellow Jack (Naut.), the yellow fever; also, the quarantine flag. See Yellow flag, under Flag. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Quarantine \Quar"an*tine\, n. [F. quarantaine, OF. quaranteine, fr. F. quarante forty, L. quadraginta, akin to quattuor four, and E. four: cf. It. quarantina, quarentine. See Four, and cf. Quadragesima.] 1. A space of forty days; -- used of Lent. [1913 Webster] 2. Specifically, the term, originally of forty days, during which a ship arriving in port, and suspected of being infected a malignant contagious disease, is obliged to forbear all intercourse with the shore; hence, such restraint or inhibition of intercourse; also, the place where infected or prohibited vessels are stationed. [1913 Webster] Note: Quarantine is now applied also to any forced stoppage of travel or communication on account of malignant contagious disease, on land as well as by sea. [1913 Webster] 3. (Eng. Law) The period of forty days during which the widow had the privilege of remaining in the mansion house of which her husband died seized. [1913 Webster] Quarantine flag, a yellow flag hoisted at the fore of a vessel or hung from a building, to give warning of an infectious disease; -- called also the yellow jack, and yellow flag. [1913 Webster]
The Collaborative International Dictionary of English v.0.48:

Yellow \Yel"low\ (y[e^]l"l[-o]), a. [Compar. Yellower (y[e^]l"l[-o]*[~e]r); superl. Yellowest.] [OE. yelow, yelwe, [yogh]elow, [yogh]eoluw, from AS. geolu; akin to D. geel, OS. & OHG. gelo, G. gelb, Icel. gulr, Sw. gul, Dan. guul, L. helvus light bay, Gr. chlo`n young verdure, chlwro`s greenish yellow, Skr. hari tawny, yellowish. [root]49. Cf. Chlorine, Gall a bitter liquid, Gold, Yolk.] 1. Being of a bright saffronlike color; of the color of gold or brass; having the hue of that part of the rainbow, or of the solar spectrum, which is between the orange and the green. [1913 Webster] Her yellow hair was browded [braided] in a tress. --Chaucer. [1913 Webster] A sweaty reaper from his tillage brought First fruits, the green ear and the yellow sheaf. --Milton. [1913 Webster] The line of yellow light dies fast away. --Keble. [1913 Webster] 2. Cowardly; hence, dishonorable; mean; contemptible; as, he has a yellow streak. [Slang] [Webster 1913 Suppl.] 3. Sensational; -- said of some newspapers, their makers, etc.; as, yellow journal, journalism, etc. [Colloq.] [Webster 1913 Suppl.] Yellow atrophy (Med.), a fatal affection of the liver, in which it undergoes fatty degeneration, and becomes rapidly smaller and of a deep yellow tinge. The marked symptoms are black vomit, delirium, convulsions, coma, and jaundice. Yellow bark, calisaya bark. Yellow bass (Zool.), a North American fresh-water bass (Morone interrupta) native of the lower parts of the Mississippi and its tributaries. It is yellow, with several more or less broken black stripes or bars. Called also barfish. Yellow berry. (Bot.) Same as Persian berry, under Persian. Yellow boy, a gold coin, as a guinea. [Slang] --Arbuthnot. Yellow brier. (Bot.) See under Brier. Yellow bugle (Bot.), a European labiate plant (Ajuga Chamaepitys). Yellow bunting (Zool.), the European yellow-hammer. Yellow cat (Zool.), a yellow catfish; especially, the bashaw. Yellow copperas (Min.), a hydrous sulphate of iron; -- called also copiapite. Yellow copper ore, a sulphide of copper and iron; copper pyrites. See Chalcopyrite. Yellow cress (Bot.), a yellow-flowered, cruciferous plant (Barbarea praecox), sometimes grown as a salad plant. Yellow dock. (Bot.) See the Note under Dock. Yellow earth, a yellowish clay, colored by iron, sometimes used as a yellow pigment. Yellow fever (Med.), a malignant, contagious, febrile disease of warm climates, attended with jaundice, producing a yellow color of the skin, and with the black vomit. See Black vomit, in the Vocabulary. Yellow flag, the quarantine flag. See under Quarantine, and 3d Flag. Yellow jack. (a) The yellow fever. See under 2d Jack. (b) The quarantine flag. See under Quarantine. Yellow jacket (Zool.), any one of several species of American social wasps of the genus Vespa, in which the color of the body is partly bright yellow. These wasps are noted for their irritability, and for their painful stings. Yellow lead ore (Min.), wulfenite. Yellow lemur (Zool.), the kinkajou. Yellow macauco (Zool.), the kinkajou. Yellow mackerel (Zool.), the jurel. Yellow metal. Same as Muntz metal, under Metal. Yellow ocher (Min.), an impure, earthy variety of brown iron ore, which is used as a pigment. Yellow oxeye (Bot.), a yellow-flowered plant (Chrysanthemum segetum) closely related to the oxeye daisy. Yellow perch (Zool.), the common American perch. See Perch. Yellow pike (Zool.), the wall-eye. Yellow pine (Bot.), any of several kinds of pine; also, their yellowish and generally durable timber. Among the most common are valuable species are Pinus mitis and Pinus palustris of the Eastern and Southern States, and Pinus ponderosa and Pinus Arizonica of the Rocky Mountains and Pacific States. Yellow plover (Zool.), the golden plover. Yellow precipitate (Med. Chem.), an oxide of mercury which is thrown down as an amorphous yellow powder on adding corrosive sublimate to limewater. Yellow puccoon. (Bot.) Same as Orangeroot. Yellow rail (Zool.), a small American rail (Porzana Noveboracensis) in which the lower parts are dull yellow, darkest on the breast. The back is streaked with brownish yellow and with black, and spotted with white. Called also yellow crake. Yellow rattle, Yellow rocket. (Bot.) See under Rattle, and Rocket. Yellow Sally (Zool.), a greenish or yellowish European stone fly of the genus Chloroperla; -- so called by anglers. Yellow sculpin (Zool.), the dragonet. Yellow snake (Zool.), a West Indian boa (Chilobothrus inornatus) common in Jamaica. It becomes from eight to ten long. The body is yellowish or yellowish green, mixed with black, and anteriorly with black lines. Yellow spot. (a) (Anat.) A small yellowish spot with a central pit, the fovea centralis, in the center of the retina where vision is most accurate. See Eye. (b) (Zool.) A small American butterfly (Polites Peckius) of the Skipper family. Its wings are brownish, with a large, irregular, bright yellow spot on each of the hind wings, most conspicuous beneath. Called also Peck's skipper. See Illust. under Skipper, n., 5. Yellow tit (Zool.), any one of several species of crested titmice of the genus Machlolophus, native of India. The predominating colors of the plumage are yellow and green. Yellow viper (Zool.), the fer-de-lance. Yellow warbler (Zool.), any one of several species of American warblers of the genus Dendroica in which the predominant color is yellow, especially Dendroica aestiva, which is a very abundant and familiar species; -- called also garden warbler, golden warbler, summer yellowbird, summer warbler, and yellow-poll warbler. Yellow wash (Pharm.), yellow oxide of mercury suspended in water, -- a mixture prepared by adding corrosive sublimate to limewater. Yellow wren (Zool.) (a) The European willow warbler. (b) The European wood warbler. [1913 Webster]
WordNet (r) 3.0 (2006):

yellow jack n 1: caused by a flavivirus transmitted by a mosquito [syn: yellow jack, yellow fever, black vomit] 2: yellow flag hoist on a ship in quarantine 3: fish of western Atlantic and Gulf of Mexico [syn: yellow jack, Caranx bartholomaei]