ERYTHRONIUM

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