Definition of constriction in English:



  • 1[mass noun] The action of making something narrower by pressure or of becoming narrower; tightening:

    ‘asthma is a constriction of the airways’
    • ‘Poisoning causes violent pain in the throat, vomiting, and possibly fatal collapse or constriction of the esophagus.’
    • ‘The thickening of the outer PD ring during constriction suggests that this may provide the driving force necessary for central plastid constriction.’
    • ‘Perhaps the larger-sized digits of adults confer some protection from such injuries, in that a larger band is required to cause constriction.’
    • ‘His heart raced, flicking against his rib cage and tightening his throat to near total constriction.’
    • ‘The job of formation of the membrane neck and its constriction resulting, eventually, in fission has to be performed by proteins.’
    • ‘There is an increased constriction of the phosphate tube, which leads to a closed back door state during the simulation.’
    • ‘The snakes that evolved venom no longer had to rely solely on constriction or other ways of physically subduing their prey.’
    • ‘Asthma results from the constriction of airways in the lungs.’
    • ‘Drugs which cause constriction of the blood vessels may be required.’
    • ‘And a rib belt is tightened to simulate the constriction on the lungs.’
    • ‘Gass suspects constriction of blood vessels that reduces oxygen delivery to breast tissues is partly to blame.’
    • ‘Similarly, histamine arises in many tissues by the decarboxylation of histidine, which in excess causes constriction or dilation of various blood vessels.’
    • ‘In one of the affected dogs the contralateral eye was not treated due to pupillary constriction at the time of surgery.’
    • ‘The final step is the constriction of ion channels that normally allow positive sodium ions to leak into the cell.’
    • ‘Distressing scenes led to constriction, reducing the flow by 35 %.’
    • ‘The initial phase of the process is vascular constriction.’
    • ‘The constriction of the skin rotates the eyelashes progressively closer to the cornea.’
    • ‘Sponges are capable of regulating the amount of flow through their bodies by the constriction of various openings.’
    • ‘Bronchial asthma is a respiratory system condition in which the air tubes to the lungs become especially vulnerable to constriction.’
    • ‘Coronary artery vasospasm is the abnormal, sudden, intense constriction of an epicardial coronary artery.’
    tightening, narrowing, shrinking, squeezing
    tightness, pressure, compression, contraction, cramp
    obstruction, blockage, impediment, congestion
    choking, strangulation
    stricture, stenosis
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    1. 1.1[count noun] A place where something has become tighter or narrower; an obstruction:
      ‘flow was impeded at bends and constrictions’
      • ‘A small tube in which there is a fixed constriction such that when blown a shrill sound is produced.’
      • ‘It is conceivable that the channel is not a rigid conduit but is subject to motions that form pockets separated by labile constrictions.’
      • ‘The constrictions were noted toward the fetal end in 4 of the 5 cases.’
      • ‘Bacteria divide symmetrically during normal growth and have a central constriction to bring about binary fission of the cell.’
      • ‘Starting almost at the base, many branches grow out of each constriction, the bead-like segments becoming gradually smaller towards the tip of the branch.’
      • ‘Epidermal plastids in tomato contain low levels of chlorophyll and commonly have central constrictions suggesting that a significant proportion is in the process of plastid division.’
      • ‘The embryonic shell is separated from the juvenile shell by a distinct embryonic constriction.’
      • ‘It turns out that the receptors also pick up the victim's pulse, and the constriction is strong enough to prevent its blood flow.’
      • ‘Climb the sandy slope away from the hole, and wriggle through a couple of constrictions into a higher level of the chamber, which may, or may not, be Cotton Chamber.’
      • ‘However, a temporary constriction occurs in the fifth largest chromosome of a variety of S. bicolor cultivated for silage, in addition to the major constriction in its largest chromosome.’
      • ‘The treated limb will show patchy areas of pallor caused by arteriolar constriction.’
      • ‘The maximum force, as previously, is required for entering the constriction from either side.’
      • ‘We do not assume any constrictions on the membrane shape far from the bud.’
      • ‘The axial ribs on the last whorl of Mexfusus extend abapically to a point above the constriction.’
      • ‘The diagnosis is emended to include the new observation of basal constrictions at dichotomies.’
      • ‘The aganglionic segment is of normal caliber without stricture or constriction.’
      • ‘Iris constriction in the large eye is caused by contraction of the outer part of the lens capsule.’
      • ‘The only other species of Cahabagnathus that has a pastiniplanate element that displays a similar constriction is C. directus.’
      • ‘Depressions are concave regions on protein surfaces that have no constriction at the mouth.’
      • ‘Arrows indicate the primary constrictions of the labeled pair of chromosomes.’
      tightening, narrowing, shrinking, squeezing
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