• WordNet 3.6
    • n tornado a purified and potent form of cocaine that is smoked rather than snorted; highly addictive
    • n tornado a localized and violently destructive windstorm occurring over land characterized by a funnel-shaped cloud extending toward the ground
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Webster's Revised Unabridged Dictionary
  • Interesting fact: In the United States, the most frequent month for a tornado to occur is in May.
    • n Tornado A violent whirling wind; specifically Meteorol, a tempest distinguished by a rapid whirling and slow progressive motion, usually accompaned with severe thunder, lightning, and torrents of rain, and commonly of short duration and small breadth; a small cyclone.
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Century Dictionary and Cyclopedia
  • Interesting fact: 898 tornadoes were recorded to have occurred in the United States in the year 2000.
    • n tornado A violent squall or whirlwind of small extent.
    • n tornado Specifically— On the west coast of Africa, from Cape Verd to the equator, a squall of great intensity and of short duration, occurring during the summer months, but most frequently and with greatest violence at the beginning and end of the rainy season. On the western part of the coast, near Sierra Leone, these squalls come from easterly points, and blow off shore; while on the eastern part of the coast, near the mouth of the Niger, they occasionally blow on shore, partly because of a variation in the direction of the squall, and partly because of a different trend of the coast. The squall is marked by peculiar, dense, arched masses of dark cloud, furious gusts of wind, vivid lightning, deafening thunder, and torrents of rain; it produces a slight rise in the barometer and a fall of temperature amounting on the average to 9° Fahr. Similar squalls in other tropical regions are usually known by the name of arched squalls, but are sometimes also called tornadoes. The principal period when these squalls occur (namely, at the change of the seasons or of the monsoons) is that in which great quantities of vapor-laden air are stopped by a land wind, and accumulate near the coast, producing a hot, sultry, unstable state of the atmosphere. The tornado is the overturning process by which the atmosphere regains its stability. The wind ordinarily turns through two or three points during its progress, but in general a complete cyclonic motion is not established.
    • n tornado In the United States, east of the 100th meridian, a whirlwind of small radius and of highly destructive violence, usually seen as a whirling funnel pendent from a mass of black cloud, occurring most frequently in the southeast quadrant of an area of low pressure several hundred miles from its center, and having a rapid progressive movement, generally toward the northeast. The principal condition precedent to the formation of a tornado, just as for a thunder-storm, is an unstable state of the atmosphere. In the tornado a whirling motion from right to left, of tremendous energy, is generated in a mass of clouds, and is often maintained for several hours, while in the ordinary thunder-storm a complete cyclonic motion probably seldom becomes established. Tornadoes generally arise just after the hottest part of the day, when the atmosphere has its maximum instability; the months of greatest frequency are April, May, June, and July. The destruction in a tornado may be caused either by the surface wind which is forced in on all sides to feed the ascending current of the tornado-funnel, or by the gyrating winds of the funnel itself when sufficiently low to come within the reach of buildings; in the latter case no structure, however strongly built, is apparently able to withstand the wind's enormous force.
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Chambers's Twentieth Century Dictionary
  • Interesting fact: The width of a tornado can range from less than ten yards to more than a mile.
    • n Tornado tor-nā′dō a violent hurricane, frequent in tropical countries
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Webster's Revised Unabridged Dictionary
From Sp. or Pg. tornar, to turn, return, L. tornare, to turn, hence, a whirling wind. The Sp. & Pg. tornada, is a return. See Turn
Chambers's Twentieth Century Dictionary
Sp., tornadatornar—L. tornāre.


In literature:

But you can figure that from the size and weight of objects lifted and from the effects of tornadoes.
"The Boy with the U. S. Weather Men" by Francis William Rolt-Wheeler
And 'fore I got back home dat tornado broke loose.
"Slave Narratives: A Folk History of Slavery in the United States" by Work Projects Administration
What a stunning sound they make, like the roaring of a tornado!
"The Knickerbocker, or New-York Monthly Magazine, May 1844" by Various
The gale increased in violence until it rivalled in fierceness a tornado.
"The Naval History of the United States" by Willis J. Abbot
Of course it is our acceptance that these masses not only accompanied tornadoes, but were brought down to this earth by tornadoes.
"The Book of the Damned" by Charles Fort
But with confidence in him, on they rush, up, over, sweeping Baume's Hessians from the field like a tornado.
"History of the United States, Volume 2 (of 6)" by E. Benjamin Andrews
Presently the room has the appearance of having been struck by a tornado.
"The Book-Hunter at Home" by P. B. M. Allan
It was remarkable that these human tornados were as violent and brief as those which scourge tropical lands as well as tropical characters.
"Captain Canot" by Brantz Mayer
After such a tornado the solitary evenings must seem lonelier than ever.
"The Lady of the Basement Flat" by Mrs. George de Horne Vaizey
Then the hunters gave the rein to their eager steeds, and the long line rushed upon the game like a tornado of centaurs.
"The Buffalo Runners" by R.M. Ballantyne

In poetry:

The path of the fierce tornado,
Overstrewn with wild debris
Of fallen habitations
And uprooted forest tree;
"The Desirable Undefined" by Jared Barhite
Rainbows! that over-arch a storm,
Or dance around a waterfall,
Tornadoes! that earth's face deform,—
Teach us, O teach us, in this hall.
"Hymns For Dedication XI" by John Pierpont
Tis the tornado's ruthless blast;
The mother stunn'd, the babe it bears
Far from her senseless frame! aghast
The maid, in speechless horror glares!
"The Swan" by William Hayley
As when the mad tornado flies,
And sounding mingles earth and skies,
And wild confusion 'fore the eyes
In terrors dressed.
So passions fell in whirlwinds rise,
And rend the breast!
"Epistle To The Rev. J--- B---, Whilst Journeying For The Recovery Of His Health" by Patrick Branwell Bronte
Nature had mocked him: thrice had claimed the reaping,
With scythe of fire, of lands she once had sown;
Sent the tornado, round his hearthstone heaping
Rafters, dead faces that were like his own.
"The Station-Master Of Lone Prairie" by Francis Bret Harte
The slightest movement of the breeze
Which bends the flowers or shakes the trees,
Or ripples river, lake, or stream,
Would man but listen—speaks of Him,
As does the loud tornado, when
It thunders down the echoing glen.
"God Everywhere" by John Bowring

In news:

At least two tornadoes touched down in Central Massachusetts late in the afternoon on Wednesday, June 1.
Jen Emmert writes at PriorFatGirl, candidly documenting her journey of losing 100 pounds through all of life's dramatic moments including new jobs, the death of her mom, wedding planning and, most recently, tornadoes.
On the Tornado ride, a park official said.
The Tornado of Idiocy That is American Politics.
Sophomore Tiffanie Moore connects on a third-inning triple for the Lady Tornadoes.
Spirit AeroSystems estimates its insurance claim from an EF-3 tornado that tore through its Wichita plant April 14 at about $400 million.
Not even a tornado warning on Wednesday could slow down the O'Neal School's boys' soccer team.
Joplin tornado victims relocate to Jefferson City .
0Joplin tornado victims relocate to Jefferson City and publish book on their experience of survival.
A request by Gov Jay Nixon for a major disaster declaration for areas across Missouri hit by May's storms, tornadoes and.
A year later, survivor of Rock Hill tornado thinks of those who died, is.
Monday was the first day of classes in the county ravaged by the March 2 tornado.
A recent study of southern tornadoes has found that storm shelters did not protect them.
Where do you take shelter when tornadoes threaten.
We know about Tornados and Hurricanes, but other things have dramatic effects as well.

In science:

The path may have the structure of a tornado.
Analysis of quantum semigroups with GKS-Lindblad generators I. Simple generators
The fluid dynamics equivalent is a kind of tornado (see , in order to have an idea on how this can be actually realized in a 3-D environment).
The Fractal Structure of Matter and the Casimir Effect
The Tornado operating system is designed for 2-level hierarchical clusters of workstations, although it is not yet clear how well this approach will work for more generalized clusters.
Cluster Computing White Paper
Stumm, Tornado: Maximizing Locality and Concurrency in a Shared Memory Multiprocessor Operating System, In the Proceedings of the 3rd Symposium on Operating Systems Design and Implementation (OSDI), pp. 87-100, February 1999.
Cluster Computing White Paper
These techniques include sensitivity analysis, tornado charts, and backsolving (or goal-seeking).
A Primer on Spreadsheet Analytics