COEFFICACY
\kˌə͡ʊˈɛfɪkəsi], \kˌəʊˈɛfɪkəsi], \k_ˌəʊ_ˈɛ_f_ɪ_k_ə_s_i]\
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.