About appeals; an appellate court has the power to review the judgment of a lower court (trial court) or tribunal. For example, the U.S. circuit courts of appeals review the decisions of the U.S. district courts.
One who appeals is called the appellant. An appellate court has the power to review the judgment of another lower court or tribunal. Attorneys - Lawyers representing the defendant or the government in a criminal case. An attorney representing the government in a criminal case is called the prosecuting or Commonwealth's attorney.