Definition of concavity in US English:


nounPlural concavities

  • 1The state or quality of being concave.

    • ‘In D. herschelensis, the concavity of the articular face of the vertebrae is not as deep as in P. latipinnis.’
    • ‘The concavity of the retina is another fact adduced in favour of the theory that our visual space is curved.’
    • ‘The concavity of the ventral interarea and shell outline varies considerably in this species.’
    • ‘It only reflects the consequence of an empirical fact, the degree of concavity of individual utility functions.’
    • ‘‘Lower’ refers to the side of the test to which the neck curves; Figure 7 provides an example of how length, width, concavity and curvature are measured.’
    • ‘Koilonychia is represented by transverse and longitudinal concavity of the nail, resulting in a ‘spoon-shaped’ nail.’
    • ‘The flow-volume curves usually show a marked decrease in flow with decreasing lung volumes, typically evidenced by concavity of the expiratory portion of the flow curve.’
    • ‘Positive own-price flexibilities violate quasi concavity of the underlying distance function, although the fact that these estimates are essentially zero moderates this concern.’
    • ‘Then the T wave becomes broad and the ST segment elevates, losing its normal concavity.’
    • ‘Keel angle and body concavity / convexity measurements (described above) were recorded from CT scans at several locations along the body.’
    • ‘With increasing quantiles, the quadratic coefficient became more negative, implying increased concavity of the inverted parabolic function.’
    • ‘However, survival curves for all the mutants showed some upward concavity, which would be consistent with a resistant subpopulation of cells.’
    • ‘The cervical centra are amphicoelous, but do not have the deep, bowl-shaped concavity as in Polycotylus.’
    • ‘There is a characteristic anterior pointing and medial concavity of the frontal horns, seen on the coronal scans.’
    • ‘A polarity is set up between the assertive convex solidity of Broadcasting House and the receptive concavity and lightness of the suspended facade.’
    • ‘Scanning electron micrographs of the discs of the tube feet of Odontaster validus revealed varying degrees of concavity.’
    • ‘Both Dr Lee and Dr Moore-Gillon agreed that the flow volume loops produced in the MAP LFTs showed some concavity, which was suggestive of airflow obstruction.’
    • ‘Ontogenetic thickening of branches reduces the degree of dorsal concavity.’
    • ‘The photolabeling of the AdoMet-binding sites displayed homotropic negative cooperativity, characterized by a curvilinear Scatchard plot with upward concavity.’
    • ‘The degree of concavity is measured by the proportionate rate of decrease of the slope, that is, the rate at which the slope decreases divided by the slope itself.’
    1. 1.1 A concave surface or thing.
      • ‘Oskar had nothing but his fists with which to fill the two concavities.’
      • ‘The shape of Taormina is a geometry of interlocking and contrapuntal curves and concavities with various centres and focal points.’
      • ‘Varied in circumference and width but uniform in texture, the smooth surfaces of the concavities contrast with the gritty exteriors, which, for the most part, are left untouched.’
      • ‘The upturned cardiac apex and the pulmonary artery concavity cause the appearance of a ‘boot shaped’ heart which is usually seen in the older child or the patient with pseudotruncus.’
      • ‘These are broad concavities in the ambitus that could be considered precursors to the ambulacral notches of certain mellitids.’
      • ‘The labial surfaces of the plates are smooth, slightly convex both mesially and distally with a shallow concavity between.’
      • ‘Instead, a very shallow longitudinal concavity is present along the midventral surface.’
      • ‘The amygdaloid body is an ovoid gray nuclear mass, oriented transversely and with a slight posterior concavity.’
      • ‘The figures are in groups, occupying concavities in the walls of the cave.’
      • ‘The light from above distorts in the concavities formed at the points on which the strider rests.’
      • ‘A deep labial concavity is present between the two projections.’
      • ‘Flakes with concavities exhibiting steep, unifacial retouch were used to whittle or plane wood, and flakes displaying spurs were used to incise bone or antler.’
      • ‘The negative shapes that result - multiple concavities as baroquely complex as the engendering ovals are rudimentary - echo with revised color choices and adjusted contours.’
      • ‘From a hill-like rise at left to the pyramidal structure and round-lipped concavity on the right, the work does so by emphasizing this Arizona as a feminized site.’
      • ‘The key observation here is that Hadrocodium has no trough or concavity.’
      • ‘In time, they would develop concavities, and would require laborious grinding to put them back into shape.’
      • ‘Considerable differences between mitochondria can also be observed: some of them are regular, spherical or oval, whereas the surface of others is irregular, with smaller or bigger concavities.’
      • ‘Ben Tre finishes the work by hand, often coating the concavities with color or gold leaf.’
      • ‘There are usually no holes all the way through but lots of protuberances and concavities.’
      hole, pit, cavity, crater, trough, cave, cavern
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