Definition of reactivity in US English:

reactivity

noun

  • 1The state or power of being reactive or the degree to which a thing is reactive.

    ‘the chemical and biological reactivity of nontarget organisms’
    in combination ‘cross-reactivity between the hormones of human and bovine origin’
    • ‘We measured the tracheal smooth muscle reactivity to methacholine.’
    • ‘The good news is that the change of a single amino acid in the major peanut allergen can reduce reactivity.’
    • ‘In particular, we examined whether pulmonary function and nonspecific airway reactivity differed depending on atopic status.’
    • ‘Basically, it's a lot of airway reactivity and a lot of inflammation.’
    • ‘Acid reflux has been associated with bronchospasm, heightened bronchial reactivity, and airway edema.’
    • ‘Pituitary adenomas exhibited intense diffuse cytoplasmic reactivity.’
    • ‘Skin test reactivity was also a significant predictor of maximal lung growth in those with respiratory symptoms regardless of sex.’
    • ‘Finally, the qualitative data provide additional support for the notion of cue reactivity.’
    • ‘There was no evidence that the magnitude of the effect on allergen skin test reactivity differed between the three parasites.’
    • ‘Our results suggest that airway wall thickening attenuates airway reactivity in patients with asthma.’
    • ‘The most significant component in array validation is the comprehensive evaluation of cross reactivity.’
    • ‘In its simplest form, it provides qualitative explanations for the formation and reactivity of molecules.’
    • ‘For the women who scored low on extraversion, no brain reactivity to positive stimuli was found.’
    • ‘Unfortunately, no postexposure measurement of bronchial reactivity was performed.’
    • ‘The chemical reactivity of titanium to the halides is similarly exhibited by its combination with their acids.’
    • ‘Interpretation relies on the presence or absence of reactivity to the specific antigens.’
    • ‘In another asthma model, airway reactivity and lung inflammation were enhanced in the lung.’
    • ‘The effect of skin test reactivity remained significant for all symptoms except exercise-induced wheeze.’
    • ‘Once a worker is sensitized to an occupational agent, bronchial reactivity usually persists.’
    • ‘Thus, one manifestation of the lack of differentiation of self is emotional reactivity.’
    responsiveness, sensitiveness
    View synonyms
    1. 1.1 The extent to which a nuclear reactor deviates from a steady state.
      ‘simulations predict that high rates of reactivity addition to the core could occur’
      • ‘The spectrum of nuclear reactivity, including intensity and extent, was graded for all categories as shown in Tables 2 and 3.’
      • ‘The temperature changes in turn modify the reactivity through different nuclear physics processes, which has a well defined influence on the number of neutrons ready to induce fission.’
      • ‘Because of the instability, an RBMK reactor that loses its coolant can under certain circumstances increase in reactivity and run progressively faster and hotter rather than shut itself down.’

Pronunciation

reactivity

/ˌrēˌakˈtivədē//ˌriˌækˈtɪvədi/