FIRST APPEARANCE
\fˈɜːst ɐpˈi͡əɹəns], \fˈɜːst ɐpˈiəɹəns], \f_ˈɜː_s_t ɐ_p_ˈiə_ɹ_ə_n_s]\
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By Princeton University
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.