• WordNet 3.6
    • n torsion a twisting force
    • n torsion a tortuous and twisted shape or position "they built a tree house in the tortuosities of its boughs","the acrobat performed incredible contortions"
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Webster's Revised Unabridged Dictionary
    • Torsion (Mech) That force with which a thread, wire, or rod of any material, returns, or tends to return, to a state of rest after it has been twisted; torsibility.
    • Torsion The act of turning or twisting, or the state of being twisted; the twisting or wrenching of a body by the exertion of a lateral force tending to turn one end or part of it about a longitudinal axis, while the other is held fast or turned in the opposite direction.
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Century Dictionary and Cyclopedia
    • n torsion The act or effect of twisting; a forcible strain of a solid body by which parallel planes are turned relatively to one another round an axis perpendicular to them. The word is also used, with less propriety, in pure geometry, to signify a similar distortion without any reference to resistance.
    • n torsion A wringing or wrenching, as of pain; a griping; tormina.
    • n torsion In surgery, the twisting of the cut end of a small artery in a wound or after an operation, for the purpose of checking hemorrhage. The bleeding vessel is seized with a forceps, drawn out for about one fourth of an inch, and twisted round several times till it cannot untwist itself.
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Chambers's Twentieth Century Dictionary
    • n Torsion tor′shun act of twisting or turning a body: the force with which a thread or wire tends to return when twisted, the kind of strain produced in a bar or wire when one end is kept fixed and the other is rotated about the axis:
    • n Torsion tor′shun (surg.) a method of common application for the purpose of checking arterial hæmorrhage in certain cases, by twisting the cut end of the artery
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Webster's Revised Unabridged Dictionary
F., fr. LL. torsio, fr. L. torquere, tortum, to twist. See Torture
Chambers's Twentieth Century Dictionary
L. torsiotorquēre, tortum, to twist.


In literature:

There are many varieties of torsion of the penis.
"Anomalies and Curiosities of Medicine" by George M. Gould
The torsion of the shaft was so great that one governor still managed to get ahead of the others.
"Edison, His Life and Inventions" by Frank Lewis Dyer and Thomas Commerford Martin
Its free motion differs entirely from that given it by torsion or stress.
"Scientific American Supplement, No. 392, July 7, 1883" by Various
It might be supposed that the torsion of the wire would appreciably affect the result.
"Scientific American Supplement, No. 447, July 26, 1884" by Various
The torsion or twisting test is useful in determining the toughness of wood.
"The Mechanical Properties of Wood" by Samuel J. Record
During the twisting some sections took far more torsion than others.
"Among the Forces" by Henry White Warren
This is because the torsion varies as the fourth power of the diameter.
"Scientific American Supplement, No. 717, September 28, 1889" by Various
The title, you see, is comprehensive: 'The Nature of Evaporating Inflammations in Arteries After Ligature, Accupressure, and Torsion.
"The Patient Observer" by Simeon Strunsky
Two of the shafts that failed showed torsional spirals running more than completely around the shaft.
"The Working of Steel" by Fred H. Colvin
The method of checking bleeding from blood-vessels by torsion was known to him.
"Outlines of Greek and Roman Medicine" by James Sands Elliott

In news:

Pure Moments with Torsion Springs Helical Products Company.
Team Chucky has created a dual-armed, cam-driven machine that holds the current world record in the torsion category — 3,636 feet.
Couplings Provide High Torsional Stiffness for Precision Positioning.
Following this ultrasound examination the diagnosis of in utero testicular torsion was made.
The patient was taken to the OR the next morning where the left testicle was found to be necrotic consistent with remote torsion.
Tom's Torsion Box Workbench with a couple modifications.
Torsion beams are incredibly strong and will always be dead straight.
Airwolf Aerospace has developed a new tension- torsion (TT) strap for Bell 206 JetRanger and 206L LongRanger helicopters and military variants, including the OH-58 Kiowa.
A slide show about testicular torsion repair.
New torsion testing e quipment designs offer state-of-the-art instrumentation and provide enhanced capabilities including greater speed, measurement accuracy, and flexibility of experiment design.
Tom's Torsion Box Workbench .
Dexter Nev-R-Adjust Rubber Torsion brake axle.
Blending visual sophistication and critical protection, Chicago Metallic ® Corporation 's SpanAir™ Torsion Spring Panels exceed performance requirements in all seismic design categories.
For smooth handling and torsional stiffness, the Sportage has a ladder frame design with six crossmembers, a double-wishbone front suspension, and four-link rear suspension.
SimulationX 3.4 is available in a 64-bit version that also contains a new torsional vibration analysis package with model objects tailored for simulations in the frequency domain.

In science:

Suppose now that E is (semi)stable and F any nontrivial subsheaf, let τ be the torsion of E /F and F ′ ⊂ E such that τ = F ′/F and E /F ′ torsion free.
Factorization of generalized theta functions at reducible case
Also the largest possible torsion class D of such a torsion pair can be described it is the class of all modules M with Hom(M , t) = 0.
Infinite dimensional representations of canonical algebras
If these conditions are satisfied, the pair (F , G ) is said to be a torsion pair with torsionfree class F , and torsion class G .
Infinite dimensional representations of canonical algebras
We want to find a criterion for g (q) to be the torsion class of a split torsion pair in Mod Λ.
Infinite dimensional representations of canonical algebras
Up to now, the torsion pairs which we have considered explicitly were torsion pairs in a complete module category Mod R, where R is any ring.
Infinite dimensional representations of canonical algebras