Definition of endogenous in US English:



  • 1Having an internal cause or origin.

    ‘the expected rate of infection is endogenous to the system’
    Often contrasted with exogenous
    • ‘The endogenous variables in the system are attendance and price.’
    • ‘It is assumed that plant growth and development are regulated by the interactions between the environment and endogenous factors, especially hormones.’
    • ‘But the long-term goal is to create the basis for internal development and endogenous growth.’
    • ‘Wheat price is clearly an endogenous player in the system, particularly at midterm and longer-term horizons.’
    • ‘The questionnaire instead focuses primarily on endogenous factors influencing the economic system.’
    • ‘All species in this system were modeled as endogenous variables in subsequent analyses.’
    • ‘Three institutional factors contribute to the endogenous problems of agricultural policy-making in the EU.’
    • ‘Second, to what extent are the impediments determined by structural factors beyond the control of the region, and to what extent are they determined by endogenous factors that can be mitigated by regional policy?’
    • ‘In fact the political system is likely to be endogenous to these basic American beliefs.’
    • ‘First, singing is highly affected by both endogenous and environmental factors, potentially making detection probabilities low and variable.’
    • ‘Further crystallisation and growth of stone are influenced by endogenous and dietary factors.’
    • ‘The mean estimates of the firm effects are much smaller in the model system that includes endogenous demand.’
    1. 1.1Biology Growing or originating from within an organism.
      ‘endogenous gene sequences’
      • ‘All endogenous genes contain promoter sequences that determine where and when they will be expressed in an organism.’
      • ‘Thus, a well-trained athlete may have a more developed endogenous antioxidant system.’
      • ‘The vast majority of mutations in human tissues are certainly of endogenous origin.’
      • ‘This served as a background level for measurement of endogenous repair systems.’
      • ‘We realize that complete prevention of cross-transmission could have changed our findings, but the majority of cases of acquisition still were considered to be from endogenous origin.’
    2. 1.2Psychiatry (of a disease or symptom) not attributable to any external or environmental factor.
      ‘endogenous depression’
      • ‘According to their monograph, it should not be used during pregnancy, by nursing mothers or by those with endogenous depression.’
      • ‘It appears that these medicines are not effective in combating symptoms of endogenous depression, which is more responsive to antidepressants.’
      • ‘His theory of endogenous depression as a block in the quest for the self gave a further basis for founding an integrated approach to depression.’
      • ‘They are the main pathogenic factors of endogenous diseases.’
      • ‘If the doctor fails to recognize the difference between these two and attempts to purge an endogenous disease, the deficiency will become more deficient.’
    3. 1.3 Confined within a group or society.
      • ‘The authors recognize that numerous factors, exogenous and endogenous to the community, can cause or contribute to these changes.’
      • ‘However, characteristics of classrooms and factors endogenous to them still carry great sway over students' decisions to rebel.’
      • ‘This process is mediated by endogenous factors, so forcing teenagers to bed early, or getting them up early in the morning, is contrary to their natural biological clock.’
      • ‘For example, the taste for discrimination may be endogenous to a particular society and consequently relatively impervious to competition.’