carbocyanine
noun
car·bo·cy·a·nine
| \ ¦kär(ˌ)bōˈsīəˌnēn, -nə̇n\
variants:
or carbocyanine dye
plural -s
Definition of carbocyanine
: any of a class of cyanine dyes in whose structure the two heterocyclic rings are joined by a three-carbon chain (as =CH−CH=CH−)
specifically
: any such dye containing two quinoline rings
— called also trimethine
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