Definition of nidus in English:



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

    • ‘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.’
    • ‘Joni had been the central nidus of her misery from Form One to Form Three.’
    • ‘Precipitated bilirubin may form a nidus for subsequent cholesterol deposition.’
    • ‘With Helen at the core, his nidus, Don's shiniest facet was as a family man.’
    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.’
      • ‘They are predisposed to preoperative airway colonization and altered host defenses, thus creating a nidus for postoperative infection.’
      • ‘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.’
      • ‘Innate immune mechanisms may also be important in preventing infections that have a nidus in the oral cavity.’


Late 17th century (in the sense ‘place in which eggs or embryos are deposited’): from Latin, literally nest.