Pallidum: Part of what are called the basal ganglia of the brain which consist of the globus pallidus and the ventral pallidum. The globus pallidus itself is a pale-appearing spherical area in the brain. (Globus is a Latin word meaning a globe or sphere. Pallidus refers to its pallor relative to the surrounding brain substance.) The globus pallidus... Found on http://www.medterms.com/script/main/art.asp?articlekey=11614