SILICICALCAREOUS

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