TRINUCLEUS

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