TRIHEDRAL

\tɹa͡ɪhˈiːdɹə͡l], \tɹa‍ɪhˈiːdɹə‍l], \t_ɹ_aɪ_h_ˈiː_d_ɹ_əl]\
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1899 - The american dictionary of the english language.
By Daniel Lyons
 
1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald

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Quinones

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