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# The Good Oil Word of the Day
- URL: https://goodoil.news/the-good-oil-word-of-the-day-772/
- Published: 2026-09-28T17:15:54.000Z
- Updated: 2026-09-28T17:15:53.000Z
- Author: David Theobald
- Tags: General, Word of the Day

The word for today is…

iridescence (noun) -

1: a lustrous rainbowlike play of color caused by differential refraction of light waves (as from an oil slick, soap bubble, or fish scales) that tends to change as the angle of view changes  
2: a lustrous or attractive quality or effect

Source : [Merriam-Webster](https://www.merriam-webster.com/dictionary/iridescent?ref=goodoil.news)

Etymology : Iris, the Greek goddess of the rainbow, took messages from Mount Olympus to earth, and from gods to mortals or other gods, using the rainbow as her stairway. Iridescence is thus the glowing, shifting, colorful quality of a rainbow, also seen in an opal, a light oil slick, a butterfly wing, or the mother-of-pearl that lines an oyster shell.

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