"Located beside the centre or a central structure; specifically (a) Anatomy designating or relating to an area of the cerebral cortex located on the medial aspect of the parietal lobe beside the central fissure (especially in paracentral lobule); (b) Medicine designating or relating to the part of the retina beside the fovea; parafoveal", Late 19th cent. From para- + central, after scientific Latin paracentralis.[paracentral etymology, paracentral origin, 英语词源]