Anything that is virtually equal to something else, or has the same value, force, etc.
An equivalent weight.
To make equivalent to; to equal.
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.
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Any name for a taxon, usually a validly published, formally accepted one, but often also an unpublished name.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).