Final answer:
An order issued by a superintendent to prohibit a practice is an executive order. An example is Executive Order 8802 by Franklin D. Roosevelt, which banned racial discrimination in federal contracts.
Step-by-step explanation:
An order issued by the superintendent that prohibits a specific practice listed in the order is called an executive order.
As an example, Executive Order 8802 was issued by President Franklin Delano Roosevelt, which banned racial discrimination among employers and contractors who dealt with the federal government. This was a direct response to advocacy from black labor leaders like A. Philip Randolph and denotes a significant step towards civil rights.
It's important to note that when a law or order, like an executive order, limits certain practices or expressions, it must be considered constitutional only if it's the least restrictive means to achieve its goals. This respects individual freedoms while addressing public interests.