1. 蛋白石般无色的；乳白色的；发乳光的
Opalescent means colourless or white like an opal, or changing colour like an opal.

1. having a play of lustrous rainbow colors

e.g. an iridescent oil slick
nacreous (or pearlescent) clouds looking like mother-of-pearl
a milky opalescent (or opaline) luster

Synonym: iridescentnacreousopalinepearlescent