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