biequivalent
English[edit]
Etymology[edit]
bi + equivalent
Adjective[edit]
biequivalent (not comparable)
 (mathematics, of two entities A and B) Both left equivalent and right equivalent; Having the property that there exists a pair of mappings M_{1} (A>B) and M_{2} (B>A) such that M_{1}M_{2}(A) is equivalent to applying the unity operator to A and M_{2} M_{1}(B) is equivalent to applying the unity operator to B.

2016, Michael Shulman, “Contravariance through enrichment”, in arXiv^{[1]}:
 We define strict and weak duality involutions on 2categories, and prove a coherence theorem that every bicategory with a weak duality involution is biequivalent to a 2category with a strict duality involution.

 (chemistry) Capable of replacing a bond formed by H_{2} to any molecule.

1876, John Forbes Royle & John Harley, Royle's Manual of Materia Medica and Therapeutics:
 This is chloride of ammomium, in which 2 atoms of hydrogen are displaced by the biequivalent atom of mercury.
