Definition of autonym:
(n) :
(linguistics, anthropology) A name used by a group or category of people to refer to themselves or their language, as opposed to a name given to them by other groups.
(n) :
The true name of a person or other entity, especially an author.
(n) :
A work published under the author's true name.
(n) :
(taxonomy) An infraspecific name in which the specific epithet is repeated.