Anything that is virtually equal to something else, or has the same value, force, etc.
An equivalent weight.
Having the equal ability to combine.
Similar or identical in value, meaning or effect; virtually equal.
Of a map, equal-area.
Equal in measure but not admitting of superposition; applied to magnitudes.
Of two sets, having a one-to-one correspondence.
Relating to the corresponding elements of an equivalence relation.
To make equivalent to; to equal.
A word or phrase with a meaning that is the same as, or very similar to, another word or phrase.
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Any name for a taxon, usually a validly published, formally accepted one, but often also an unpublished name.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 whose meaning is the same as that of another word.
Any of the formal names for a taxon, including the valid name (i.e. the senior synonym).