Exhibiting a milky iridescence like that of an opal.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "opalescent" in a sentence
"Oh – the purple blue opalescent is my fav, followed by the blue-red."
"To the observer of the aura the term "opalescent" instinctly presents itself, for there is a striking resemblance to the opaline peculiar play of colors of delicate tints and shades in a body of pearly or milky hue."
"Mountains of fresh cucumbers, radishes, and green onions, whole heads of romaine, and delicate, opalescent peeled white onions."