JEFFERSONIAN

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