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’
    • ‘Asthma results from the constriction of airways in the lungs.’
    • ‘His heart raced, flicking against his rib cage and tightening his throat to near total constriction.’
    • ‘Sponges are capable of regulating the amount of flow through their bodies by the constriction of various openings.’
    • ‘The final step is the constriction of ion channels that normally allow positive sodium ions to leak into the cell.’
    • ‘Gass suspects constriction of blood vessels that reduces oxygen delivery to breast tissues is partly to blame.’
    • ‘And a rib belt is tightened to simulate the constriction on the lungs.’
    • ‘Distressing scenes led to constriction, reducing the flow by 35 %.’
    • ‘Bronchial asthma is a respiratory system condition in which the air tubes to the lungs become especially vulnerable to constriction.’
    • ‘Poisoning causes violent pain in the throat, vomiting, and possibly fatal collapse or constriction of the esophagus.’
    • ‘The job of formation of the membrane neck and its constriction resulting, eventually, in fission has to be performed by proteins.’
    • ‘Similarly, histamine arises in many tissues by the decarboxylation of histidine, which in excess causes constriction or dilation of various blood vessels.’
    • ‘Coronary artery vasospasm is the abnormal, sudden, intense constriction of an epicardial coronary artery.’
    • ‘The snakes that evolved venom no longer had to rely solely on constriction or other ways of physically subduing their prey.’
    • ‘The constriction of the skin rotates the eyelashes progressively closer to the cornea.’
    • ‘There is an increased constriction of the phosphate tube, which leads to a closed back door state during the simulation.’
    • ‘Drugs which cause constriction of the blood vessels may be required.’
    • ‘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.’
    • ‘In one of the affected dogs the contralateral eye was not treated due to pupillary constriction at the time of surgery.’
    • ‘The initial phase of the process is vascular constriction.’
    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’
      • ‘The axial ribs on the last whorl of Mexfusus extend abapically to a point above the constriction.’
      • ‘Bacteria divide symmetrically during normal growth and have a central constriction to bring about binary fission of the cell.’
      • ‘Arrows indicate the primary constrictions of the labeled pair of chromosomes.’
      • ‘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.’
      • ‘A small tube in which there is a fixed constriction such that when blown a shrill sound is produced.’
      • ‘Iris constriction in the large eye is caused by contraction of the outer part of the lens capsule.’
      • ‘The diagnosis is emended to include the new observation of basal constrictions at dichotomies.’
      • ‘It turns out that the receptors also pick up the victim's pulse, and the constriction is strong enough to prevent its blood flow.’
      • ‘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.’
      • ‘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.’
      • ‘We do not assume any constrictions on the membrane shape far from the bud.’
      • ‘It is conceivable that the channel is not a rigid conduit but is subject to motions that form pockets separated by labile constrictions.’
      • ‘The aganglionic segment is of normal caliber without stricture or constriction.’
      • ‘The constrictions were noted toward the fetal end in 4 of the 5 cases.’
      • ‘The maximum force, as previously, is required for entering the constriction from either side.’
      • ‘Depressions are concave regions on protein surfaces that have no constriction at the mouth.’
      • ‘The embryonic shell is separated from the juvenile shell by a distinct embryonic constriction.’
      • ‘The only other species of Cahabagnathus that has a pastiniplanate element that displays a similar constriction is C. directus.’
      • ‘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.’
      • ‘The treated limb will show patchy areas of pallor caused by arteriolar constriction.’
      tightening, narrowing, shrinking, squeezing
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