CONTACT LENSES
\kˈɒntakt lˈɛnzɪz], \kˈɒntakt lˈɛnzɪz], \k_ˈɒ_n_t_a_k_t l_ˈɛ_n_z_ɪ_z]\
Word of the day
Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.