"opalescent" in the adjective sense
1. iridescent, nacreous, opalescent, opaline, pearlescent
having a play of lustrous rainbow colors
"an iridescent oil slick"
"nacreous (or pearlescent) clouds looking like mother-of-pearl"
"a milky opalescent (or opaline) luster"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License