luster Look up luster at Dictionary.com
1520s, 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.)).