PERENNIBRANCHIATA

\pˌɛɹɪnˌɪbɹankɪˈɑːtə], \pˌɛɹɪnˌɪbɹankɪˈɑːtə], \p_ˌɛ_ɹ_ɪ_n_ˌɪ_b_ɹ_a_n_k_ɪ__ˈɑː_t_ə]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.