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trivalence
trivalence n. 
/ˈtraɪvələns//ˈtrɪv-/ the quality of being trivalent.
/ˈtraɪvələns//ˈtrɪv-/ the quality of being trivalent.ΘΚΠ
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trivalence1888
1888 Athenæum 21 July 102/2 The trivalence of the metals of the aluminium group.
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