amido naphthol red

noun, often capitalized A&N&R
ami·​do naph·​thol red | \¦aməˌdō¦-\

Definition of amido naphthol red 

: either of two red acid azo dyes

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First Known Use of amido naphthol red

1903, in the meaning defined above

History and Etymology for amido naphthol red

amid- + naphthol

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The first known use of amido naphthol red was in 1903

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