contraction

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contraction,

in physics: see expansionexpansion,
in physics, increase in volume resulting from an increase in temperature. Contraction is the reverse process. When heat is applied to a body, the rate of vibration and the distances between the molecules composing it are increased and, hence, the space occupied by the
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.

contraction,

in writing: see abbreviationabbreviation,
in writing, arbitrary shortening of a word, usually by cutting off letters from the end, as in U.S. and Gen. (General). Contraction serves the same purpose but is understood strictly to be the shortening of a word by cutting out letters in the middle, the omission
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.
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contraction

[kən′trak·shən]
(graphic arts)
A microfilm defect in the form of a compressed image that occurs when the film speed is reduced as the document passes through a rotary microfilmer.
(mathematics)
A function f from a metric space to itself for which there is a constant K that is less than 1 such that, for any two elements in the space, a and b, the distance between f (a) and f (b) is less than K times the distance between a and b.
(mechanics)
The action or process of becoming smaller or pressed together, as a gas on cooling.
(physiology)
Shortening of the fibers of muscle tissue.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

contraction

Of concrete, the sum of volume changes occurring as the result of all processes affecting the bulk volume of a mass of concrete.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

contraction

1. Physiol any normal shortening or tensing of an organ or part, esp of a muscle, e.g. during childbirth
2. Pathol any abnormal tightening or shrinking of an organ or part
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

contraction

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References in periodicals archive ?
However, the focus of this article is on the basic muscle actions performed in a BODYPUMP class: isometric and the concentric and eccentric phases of isotonic contractions.
Muscular endurance can be measured using isometric, isokinetic, or isotonic contractions by directing subjects to sustain an isometric contraction as long as possible at a force corresponding to a specified percentage of isometric strength, by performing isokinetic contractions at a set cadence until torque decreases to a specified percentage or maximum, or by performing the maximum number of isotonic contractions against a resistance set at a specified percentage of the 1-RM.
The isotonic contractions were measured with a digital ultrasonic measurement system (Sonometrics TRX series 8).