FOCUS OF A LENS
\fˈə͡ʊkəs əvə lˈɛnz], \fˈəʊkəs əvə lˈɛnz], \f_ˈəʊ_k_ə_s ə_v_ə l_ˈɛ_n_z]\
Word of the day
Tetrachlorvinphos
- An organophosphate cholinesterase inhibitor that is used as insecticide. It has low mammalian toxicity. (From Merck Index, 11th ed)