This is the term given to a law that a judicial body overturns because it violates basic or specific rules of the government.

The term is "unconstitutional".

Explanation:

The courts (the judicial bodies) are entitled to conduct judicial reviews, by means of which they decide whether a law is in accordance with the US Constitution or if such law violates it.

The judicial branch is the branch that has the authority to interpret the US Constitution and, therefore, determine if a law passed by Congress is constitutional or not.

The Constitution is the supreme law; consequently, no other law can violate or contradict it. If it is supreme, it is at the top of the pyramid and it is the source of all legal rules and regulations.

unconstitutional