A more thorough explanation:

Definition: Panel is a term used in reference to (1) jurors and (2) judges. A jury panel refers to the group of people selected as potential jurors from which the jury for a specific case will be chosen. A judicial panel is a group of judges selected from all the judges of a particular court.

• Jury Panel: A jury panel, also known as a jury pool or venire, is selected at random from a pool of potential jurors. The names of all potential jurors are listed, and from this list, a smaller group is chosen to serve on the jury for a specific case.
• Judicial Panel: A judicial panel is a group of judges selected from all the judges of a particular court. For example, a federal appellate court is made up of a three-judge panel. In certain circumstances, federal district courts can also consist of a three-judge panel instead of an individual judge.
• Arbitral Panel: In domestic arbitrations, an arbitral panel refers to the group of three arbitrators appointed to resolve the parties' dispute. In international arbitrations, this group of three arbitrators is called an arbitral tribunal.
• Panel Attorney: A panel attorney is a private attorney appointed by the court to represent an indigent defendant. Panel attorneys belong to a panel of private attorneys who have been approved by the court to have defense expertise.

These examples illustrate how the term "panel" is used in legal contexts to refer to a group of people selected for a specific purpose, such as serving on a jury or making a judicial decision. The term can also refer to a group of attorneys appointed by the court to represent indigent defendants.