OPTICAL AXIS
\ˈɒptɪkə͡l ˈaksɪs], \ˈɒptɪkəl ˈaksɪs], \ˈɒ_p_t_ɪ_k_əl ˈa_k_s_ɪ_s]\
Word of the day
Snake's-head
- Guinea-hen flower; -- so called in England because its spotted petals resemble the scales of a snake's head.