PEREMPTORY DEFENSE
\pˈɛɹɪmptəɹˌi dɪfˈɛns], \pˈɛɹɪmptəɹˌi dɪfˈɛns], \p_ˈɛ_ɹ_ɪ_m_p_t_ə_ɹ_ˌi d_ɪ_f_ˈɛ_n_s]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.