ORB  , a circle or

ring (Lat. orbis), hence a globe or disk or other spherical object . It is thus used, chiefly poetically, of any of the heavenly bodies, including the earth itself (Lat. orbis terrarum), or of the eye-ball or eye . The " orb," also known as the " mound " (Lat. mundus, " world "), consisting of a globe surmounted by a cross, forms part of many regalia, being a symbol of sovereignty (see REGALIA) . In architecture the meaning to be attached to the word " orb " is doubtful . It is usually now taken to mean properly a blank or blind window, and thence a blank panel . If so the word represents Lat. orbus, " bereft of," " orphaned," fenestra orba luminis . It is also identified with a circular boss concealing the intersection of arches in a vault .