biequivalent adjective2 •Both left equivalent and right equivalent; Having the property that there exists a pair of mappings M₁ (A->B) and M₂ (B->A) such that M₁M₂(A) is equivalent to applying the unity operator to A and M₂ M₁(B) is equivalent to applying the unity operator to B. •Capable of replacing a bond formed by H₂ to any molecule.This is chloride of ammomium, in which 2 atoms of hydrogen are displaced by the biequivalent atom of mercury. — 1876
