Producing a display of lustrous, rainbowlike colors: an iridescent oil slick; iridescent plumage.
Brilliant, lustrous, or colorful in effect or appearance: "The prelude was as iridescent as a prism in a morning room” ( Carson McCullers).
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.