STEP-SISTER
\stˈɛpsˈɪstə], \stˈɛpsˈɪstə], \s_t_ˈɛ_p_s_ˈɪ_s_t_ə]\
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Hydrocorallia
- division Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids life project from small pores in the coral resemble other hydroids. See Millepora.