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.
Cognitive deficit. Cognitive impairment redirects here. For other forms of cognitive impairment, see Cognitive impairments. Cognitive deficit or cognitive impairment is an inclusive term to describe any characteristic that acts as a barrier to the cognition process. It usually refers to a durable characteristic, as opposed to altered level of consciousness, which may be acute and reversible.