cyanine

noun

cy·a·nine | \ ˈsī-ə-ˌnēn

How to pronounce cyanine (audio)

, -nən\

Definition of cyanine

: any of various dyes used especially to sensitize photographic film to light from the green, yellow, red, and infrared regions of the spectrum

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The first known use of cyanine was circa 1872

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