The Collaborative International Dictionary
Automorphism
Automorphism \Au`to*mor"phism\, n.
Automorphic characterization.
--H. Spenser.
Wiktionary
automorphism
n. (context mathematics English) An isomorphism of a mathematical object or system of objects onto itself.
Wikipedia
Automorphism
In mathematics, an automorphism is an isomorphism from a mathematical object to itself. It is, in some sense, a symmetry of the object, and a way of mapping the object to itself while preserving all of its structure. The set of all automorphisms of an object forms a group, called the automorphism group. It is, loosely speaking, the symmetry group of the object.
Usage examples of "automorphism".
There was a spearlike green plast representing a specific type of mapping, and automorphism, and the thought: Death lies within me grew from the central concept.