VIGESIMATION

\vˌa͡ɪd͡ʒsɪmˈe͡ɪʃən], \vˌa‍ɪd‍ʒsɪmˈe‍ɪʃən], \v_ˌaɪ_dʒ_s_ɪ_m_ˈeɪ_ʃ_ə_n]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.
 
1914 - Nuttall's Standard dictionary of the English language
By Nuttall, P.Austin.