Meta
In epistemology the prefix meta- is used to mean about. For example, metadata is data about data (who has produced it, when, what format the data is in and so on). Similarly, meta-memory in psychology means an individual's intuition about whether or not she would remember something if she concentrated on recalling it. Any subject can be said to have a meta-theory, which is the theoretical consideration of its foundations and methods.See meta-ethics, metalogic, metamathematics, metaphysics, meta-philosophy, metadata, metacorder. See also Wikipedia:Meta.
In Greek mythology, Meta was the first wife of Aegeas. She bore him no heirs.