Equivalence /(ē̇*kwĭv"ȧ*lens)/

E·quiv·a·lence

Equivalence

n.
  1. The condition of being equivalent or equal; equality of worth, value, signification, or force; as, an equivalence of definitions.
  2. Equal power or force; equivalent amount.
  3. The quantity of the combining power of an atom, expressed in hydrogen units; the number of hydrogen atoms can combine with, or be exchanged for; valency. See Valence. (Chem.) [R.]

Equivalence

v. t.
  1. To be equivalent or equal to; to counterbalance. [R.]