luster Look up luster at Dictionary.com
c.1522, from M.Fr. lustre "gloss, radiance," common Romanic (cf. Sp., Port. lustre, Rum. lustru, It. lustro "splendor, brilliancy"), from L. lustrare "spread light over, brighten, illumine," related to lucere "shine," lux "light" (see light (n.)).