(chemistry) 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.
(countable, mathematics) An equivalence relation; ≡; ~
(geometry) A number in intersection theory. A positive-dimensional variety sometimes behaves formally as if it were a finite number of points; this number is its equivalence.
(mathematics) A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
(translation studies) The degree to which a term or text in one language is semantically similar to its translated counterpart.
(uncountable) The condition of being equivalent or essentially equal.
(uncountable, logic) The relationship between two propositions that are either both true or both false.
verb
(transitive) To be equivalent or equal to; to counterbalance.
equivalency
equivalency
noun
(countable) An equivalent thing.
(uncountable) equivalence
unequivocal
unequivocal
adj
(possibly dated) Without equal, matchless.
Unambiguous; without equivocation or ambiguity; singularly clear, unmistakable, or unquestionable