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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.

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.

contraction

Of concrete, the sum of volume changes occurring as the result of all processes affecting the bulk volume of a mass of concrete.

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

contraction

References in periodicals archive ?
However, as demand softened at the peak, firms began to trim payrolls, and this pruning continued in an aggressive fashion through the recession; as a result, output per hour was better maintained during the 1990-91 contraction than during previous downturns.
1925) Length of muscle, and the heat and tension developed in an isometric contraction.
This is the first large-scale study to measure how contraction rates evolve during labor, and the results of this study help to clarify the clinical significance of high contraction rates," said Emily Hamilton, MD, PeriGen's SVP of Clinical Research, and one of the authors of the study.
Changes 017 the spontaneous or carbachol-induced contractions of isolated whole bladder after CYP treatment
This technique provides resident reinforcement and guidance as to proper muscle utilization and duration and amplitude of the contraction.
Silence is filled by music in Silent Movie, perhaps a contraction, perhaps not.
A catheter or air-filled balloon inserted into the anus is slowly pulled back through the sphincter muscle to measure muscle tone and contractions.
Expansions would be uncorrelated with succeeding contractions, but contractions would be correlated with succeeding expansions.
When the contractions are seven minutes apart it's time to go to hospital.
The authors discovered that overhead isometric contractions of the arm required less effort and induced less hemodynamic stress than waist level contractions.
During the low-intensity, long-duration session, women reported greater pain ratings than did men, both before and after contractions.