equivalence

The condition of being equivalent or essentially equal.

An equivalence relation; ≡; ~

The relationship between two propositions that are either both true or both false.

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.

A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.

To be equivalent or equal to; to counterbalance.

[…] whether the transgression of Eve seducing, did not exceed that of Adam seduced, or whether the resistibility of his reason did not equivalence the facility of her seduction, we shall referre it unto the Schoolman.

[…] every one being struck with wonder at the vertue and patience of the sufferers, began to think that worthy the enquiring into, which men thought so much better worth then their lives; and these reflections converted more then the best verball expressions, to such auditors, as thought life not to be equivalenced by any compensation.