Definition of efflux in English:


See synonyms for efflux on


  • 1 technical The flowing out of a particular substance or particle.

    ‘the same active efflux of sodium from the cytoplasm to the external medium’
    • ‘For the first category of compounds, it is the cell wall, together with the outer membrane and associated proteins, which presents a potential barrier to influx and efflux of chemical compounds.’
    • ‘The first step in this process is calcium ion efflux from the cells.’
    • ‘The scary aspect of this is that calcium ion efflux occurs at intensities and field strengths that are extremely low.’
    • ‘In this study, glucose uptake and efflux from border cells was measured in vitro.’
    • ‘Later, the efflux of solutes from chloroplasts was measured.’
    leak, leakage, spill, seepage, drip, dribble, discharge, emanation, issue, flow, outflow, outpouring, gush
    1. 1.1Material that is flowing out.
      ‘the routing for the jet efflux also needs to be considered’
      • ‘Together, these findings are consistent with the current being carried by a burst of Cl - efflux through Cl - permeable channels that activate almost simultaneously.’
      • ‘Diverse mechanisms may be responsible for the development of resistance for Cr in microbes, including chromate efflux 85.’
      • ‘So, by such a transport inhibition of ketone body efflux from the liver, the brain is deprived of those energetic compounds leading to lower BDH activity.’
      • ‘It is a feature of the results in Fig.2 that sucrose efflux and K + efflux respond similarly to rises in turgor, including the larger rise at highest turgor seen in P. vulgaris though not always in V. faba.’
      • ‘Efflux was then measured in tubes containing an assay layer without added Glc.’
    2. 1.2
      another term for effluxion (sense 1)



/eˈfləks/ /ɛˈfləks/


Mid 16th century from medieval Latin effluxus, from effluere ‘flow out’.