Definition of cortical in US English:

cortical

adjective

  • 1Anatomy
    Relating to the outer layer of the cerebrum.

    ‘the imaging of the brain showed cortical atrophy’
    • ‘This suggests that males and females may use similar cortical regions when solving spatial tasks at which they tend to excel.’
    • ‘Such memories are thought to be stored in cortical areas more toward the back of the brain.’
    • ‘At one month of age there is intensive activity in the cortical and subcortical regions that control sensory-motor functions.’
    • ‘They concluded that the cortical stimulation does not affect one's intention to act.’
    • ‘This work has determined that separate cortical areas of the brain are responsive to different kinds of visual information.’
    1. 1.1 Relating to an outer layer of another organ or body part such as a kidney.
      ‘the outline of the kidney is irregular due to cortical scarring’
      • ‘Those findings support a role for vitamin C in reducing the risk of cortical cataracts in women younger than 60.’
      • ‘A statistically significant relationship was found between past vitamin E supplementation and prevention of cortical cataract.’
      • ‘Ultrasound of the abdomen revealed a large simple left renal cortical cyst.’
      • ‘The cortical layer is actually the middle or inner layer of the hair shaft that provides the strength, elasticity and shape of the curly hair.’
      • ‘Samples of renal cortical tissue from mice were examined with the electron microscope.’
  • 2Botany
    Relating to or forming an outer layer of tissue immediately below the epidermis of a stem or root.

    ‘a probe was inserted into cortical cells of cotton roots’
    • ‘In well-watered primary roots, the length of mature cortical cells increased slightly.’
    • ‘For each experiment, the measurement on cortical cells was done on three plants.’
    • ‘In certain cases, we are left to question whether any consideration of cortical rings provided the estimated date or if the estimation was simply based upon tree size.’
    • ‘The damage is limited to the cortical layers and does not extend into the interior portions of the root system.’
    • ‘In the soil solution, nitrate is carried towards the root by bulk flow and is taken up by epidermal and cortical cells of the root.’

Pronunciation

cortical

/ˈkɔrdək(ə)l//ˈkôrdək(ə)l/