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1899 - The american dictionary of the english language.
By Daniel Lyons
 
1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.
 
1871 - The Cabinet Dictionary of the English Language

Word of the day

Quinones

  • Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.
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