bluing (agent used in laundering)

(historical) The north-central part of what later became Namibia, inhabited by the Damaras, bounded roughly by Ovamboland in the north, the Namib Desert in the west, the Kalahari Desert in the east...

A surname from German.

forming an adjunct / additional; neither basic nor primary / (logic) the property of two operations x and y, such that ax(ayb) = a, and ay(axb) = a