TRISECTION
\tɹa͡ɪsˈɛkʃən], \tɹaɪsˈɛkʃən], \t_ɹ_aɪ_s_ˈɛ_k_ʃ_ə_n]\
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The division of a thing into three parts, Specifically: (Geom.) the division of an angle into three equal parts.
By Oddity Software