Equivalence

Webster's Dictionary of the English Language

·noun Equal power or force; equivalent amount.

II. Equivalence ·vt To be equivalent or equal to; to Counterbalance.

III. Equivalence ·noun The degree of combining power as determined by relative weight. ·see Equivalent, ·noun, 2.

IV. Equivalence ·noun The condition of being equivalent or equal; equality of worth, value, signification, or force; as, an equivalence of definitions.

V. Equivalence ·noun 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.