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uniequivalent
uniequivalent adj. 
/ˌjuːnɪᵻˈkwɪvl̩ənt/, /ˌjuːnɪᵻˈkwɪvl̩n̩t/, /ˌjuniiˈkwɪv(ə)lənt/ = univalent adj.
Brit. /ˌjuːnɪᵻˈkwɪvələnt/
, /ˌjuːnɪᵻˈkwɪvələnt//ˌjuːnɪᵻˈkwɪvl̩ənt//ˌjuːnɪᵻˈkwɪvl̩n̩t/U.S. /ˌjuniəˈkwɪv(ə)lənt/
, /ˌjuniəˈkwɪv(ə)lənt//ˌjuniiˈkwɪv(ə)lənt/Π
1867 Chambers's Encycl. IX. 537/1 Monad or Uniequivalent Elements (or Monads), one atom of which in combination is equivalent to..one atom of hydrogen.
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