Opalescence - Wikipedia The general definition of opalescence is a milky iridescence displayed by an opal, which describes the visual effect of precious opal very well, and opalescence is commonly used in lay terms as a synonym for iridescence [4]
Opalescent - definition of opalescent by The Free Dictionary Define opalescent opalescent synonyms, opalescent pronunciation, opalescent translation, English dictionary definition of opalescent adj Exhibiting a milky iridescence like that of an opal o′pal·es′cence n American Heritage® Dictionary of the English Language, Fifth Edition
opalescent - Wiktionary, the free dictionary Adjective opalescent (comparative more opalescent, superlative most opalescent) Exhibiting a milky iridescence like that of an opal