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
Lafayette's mixture
- Preparation of copaiba, cubebs, spirit nitrous ether, and liquor potassae. See under Lafayette.