BIVALENCY

\ba͡ɪvˈe͡ɪlənsi], \ba‍ɪvˈe‍ɪlənsi], \b_aɪ_v_ˈeɪ_l_ə_n_s_i]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.