There are multiple definitions:

  1. user-centered design(English)

  2. urea cycle disorder(English)

    • represents a group of rare inherited metabolic disorders resulting from a partial or complete deficiency of one of the urea cycle components, thereby resulting in accumulation of ammonia, as well as other nitrogenous products, including glutamine and alanine. Hyperammonemia results in cerebral edema and neurologic injury. These disorders may present at birth, childhood, or adulthood and may range from a relatively mild encephalopathy to profound developmental disability. Early diagnosis and treatment may prevent some of the adverse outcomes, which are primarily neurological
    • Congenital disorders, Metabolism, Disability, Brain (dys)function, Neuropathy
    • https://doi.org…10529-4.00057-7