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.
Noun. 1. cognitive process - (psychology) the performance of some composite cognitive activity; an operation that affects mental contents; the process of thinking; the cognitive operation of remembering. cognitive operation, mental process, process, operation.