What is the legal term for an order from a higher court directing a lower court to take a specific action?

The legal term for an order from a higher court directing a lower court to take a specific action is known as "mandamus." This term is derived from Latin and means "we command." It is a legal remedy that compels a lower court, government agency, or official to perform a duty that is mandatory and required by law. Mandamus is typically issued in situations where there is no other adequate remedy available, highlighting its role as a tool to ensure that justice is served and that lower courts uphold their responsibilities.

In contrast, a subpoena refers to a legal document that orders an individual to appear in court or produce evidence, which is not the same as directing a court to take action. Certiorari is a type of writ by which a higher court reviews the decisions of a lower court, but it does not mandate any specific action; rather, it is a request for review. Amicus curiae, meaning "friend of the court," refers to a person or entity that offers information, expertise, or insight to assist the court in making its decision but does not serve as an order or command to a court to act. Thus, mandamus is the precise term that describes the situation outlined in the question.