iridizationn.
/ˌɪrɪdʌɪˈzeɪʃən/ 1. The action or process of showing prismatic colours as in the rainbow; irisation.
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the world > matter > colour > variegation > iridescence > [noun]
waving1662
chatoyant1798
iridescence1804
pavonine1805
chatoyement1816
reflet1849
nacreness1862
iridization1884
nacreosity1931
1884 Pop. Sci. Monthly June 288 M. Cornu lately described to the French Academy of Sciences a white rainbow..This rainbow was wholly white, without even as much iridization as is noticeable in halos, and had a fleecy appearance.
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2. Pathology. The coloured halo seen round a light by persons affected with glaucoma ( Cent. Dict.).
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2018).
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n.1884