irisation

noun iris·ation \ˌīrə̇ˈsāshən\

Definition of irisation

plural

-s

  1. 1 :  the act or process of making iridescent the irisation of a culture plate by developing bacteria

  2. 2 :  iridescence irisations in a cloud are evidence that it is composed of water droplets — D. W. Perrie in the area of the sun beautiful irisations may occur

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