Source : WordNet®

pearlescent
     adj : having a play of lustrous rainbow-like colors; "an
           iridescent oil slick"; "nacreous (or pearlescent)
           clouds looking like mother-of-pearl"; "a milky
           opalescent (or opaline) luster" [syn: {iridescent}, {nacreous},
            {opalescent}, {opaline}]