The degree to which a term or text in one language is semantically similar to its translated counterpart.
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 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.
An equivalence relation; ≡; ~
A Boolean operation that is TRUE when both input variables are TRUE or both input variables are FALSE, but otherwise FALSE; the XNOR function.
The condition of being equivalent or essentially equal.
The relationship between two propositions that are either both true or both false.
To be equivalent or equal to; to counterbalance.
A word whose meaning is the same as that of another word.
An alternative (often shorter) name defined for an object in a database.
Any name for a taxon, usually a validly published, formally accepted one, but often also an unpublished name.
A word or phrase with a meaning that is the same as, or very similar to, another word or phrase.
Any of the formal names for a taxon, including the valid name (i.e. the senior synonym).