PITH HELMET
\pˈɪθ hˈɛlmɪt], \pˈɪθ hˈɛlmɪt], \p_ˈɪ_θ h_ˈɛ_l_m_ɪ_t]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.