PRESENSION
\pɹɪsˈɛnʃən], \pɹɪsˈɛnʃən], \p_ɹ_ɪ_s_ˈɛ_n_ʃ_ə_n]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.