GRADE CROSSING
\ɡɹˈe͡ɪd kɹˈɒsɪŋ], \ɡɹˈeɪd kɹˈɒsɪŋ], \ɡ_ɹ_ˈeɪ_d k_ɹ_ˈɒ_s_ɪ_ŋ]\
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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.