Definition of nidus in English:



  • 1A place in which something is formed or deposited; a site of origin.

    figurative ‘many models of society see the main nidus of struggle residing in the sphere of production’
    • ‘Joni had been the central nidus of her misery from Form One to Form Three.’
    • ‘With Helen at the core, his nidus, Don's shiniest facet was as a family man.’
    • ‘Precipitated bilirubin may form a nidus for subsequent cholesterol deposition.’
    • ‘What this means is that for one to find you, it must have been flying around, in which case you'd hear it, or they're nesting, in which case you'd hear them coming out of the filthy nidus.’
    1. 1.1Medicine A place in which bacteria have multiplied or may multiply; a focus of infection.
      • ‘The central venous catheter, or an associated thrombus, can act as a nidus for infection.’
      • ‘Conversely, their longer degradation periods could lead to prolonged discomfort from foreign material that could also provide a nidus for infection.’
      • ‘Innate immune mechanisms may also be important in preventing infections that have a nidus in the oral cavity.’
      • ‘The clinical significance of lymphoid hyperplasia lies in the possibility of these nodules serving as a nidus for prolapse and intussusception and in the association with immunosuppressive states.’
      • ‘They are predisposed to preoperative airway colonization and altered host defenses, thus creating a nidus for postoperative infection.’


Late 17th century (in the former sense ‘place in which an insect deposits its eggs’): from Latin, literally ‘nest’.