# equivalence

[ih-kwiv-uh-luh ns or for 3, ee-kwuh-vey-luh ns]

### noun Also equivalency (for defs 1, 2).

the state or fact of being equivalent; equality in value, force, significance, etc.

an instance of this; an equivalent.

Chemistry. the quality of having equal valence.

Logic, Mathematics.

- Also called material implication.the relation between two propositions such that the second is not false when the first is true.
- Also called material equivalence.the relation between two propositions such that they are either both true or both false.
- the relation between two propositions such that each logically implies the other.

### adjective

(of a logical or mathematical relationship) reflexive, symmetrical, and transitive.

## Origin of equivalence

1535–45; < Middle French < Medieval Latin aequivalentia, equivalent to Latin aequivalent- equivalent + -ia -ia; see -ence

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

## Related Words for equivalence

correspondence, par, likeness, parity, synonym, agreement, compatibility, evenness, correlation, equality, match, conformity, parallel, identity, interchangeability, synonymy## Examples from the Web for equivalence

### Contemporary Examples of equivalence

He was trying, I think, to demonstrate balance and equivalence.

The equivalence between comic books and Scripture is telling of how seriously canon is taken by these fans.

The experiment found that the type of atom made no difference to the outcome, perfectly in line with the equivalence principle.

The Equivalence Principle and Testing Einstein With Spaceships and AtomsMatthew R. Francis

June 4, 2014

### Historical Examples of equivalence

Then the expression of equivalence of A and B remains unchanged.

He satisfies himself as to the equivalence of the servicesthat is all.

Harmonies of Political EconomyFrdric Bastiat

If we had the means of measurement we could prove the equivalence from step to step.

Life EverlastingJohn Fiske

There is no law of equivalence, of conservation of energy, in social forces.

Social ValueB. M. Anderson

By 1709 these species had sunk in equivalence to 12 livres 15 sols.

The History of Currency, 1252 to 1896William Arthur Shaw

## equivalence

### equivalency

### noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Online Etymology Dictionary, © 2010 Douglas Harper