Chimerism is what happens when cells from one twin are present in the other. For example, white blood cells with Y chromosomes would be found in the female twin.
: of, relating to, or involving conscious mental activities (such as thinking, understanding, learning, and remembering). cognitive development/psychology/impairment. [+] more examples [-] hide examples [+] Example sentences [-] Hide examples.
Definitions. Cognitive deficit is an inclusive term that is most often used to describe deficits in intellectual functioning in global disorders (eg, mental retardation). Less often, it is used to describe specific deficits in cognitive abilities (eg, certain learning disabilities such as dyslexia). In contrast, terms such as learning disability are used to describe specific deficits in processes that may have little to do with overall cognitive functioning.