iridescent

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ir·i·des·cent

(ir'i-des'ent),
Presenting multiple bright refractile colors, typically as a result of optical interference when incident white light is broken into its spectral components when reflected back through several thin-layered films.
[G. iris, rainbow]

iridescent

Presenting a rainbow-like play of colours as in soap bubbles.
References in periodicals archive ?
(10) Frigate birds, also superior predators, are often represented by the Owa eating freshly caught fish; recurrent graphical references to these birds, whose feathers are black with a bluish iridescence, undoubtedly testifies to men's desire to absorb their speed, agility, and the impressive piracy they display against other sea birds, capturing them in their talons and knocking them against the ocean surface to force them to drop their prey or regurgitate their food.
(6.) Iridescence visible on raw tuna, beef, and pork flesh involves optical light diffraction resulting from muscle's striated structure and fibrous nature.
Iridescence: A Rainbow of Colors, Causes, and Concerns.
Optical characteristics of natural iridescence in meat.