term:

Commerce Clause

commerce clause n

often cap both Cs
: a clause in Article I, Section 8 of the U.S. Constitution that empowers Congress to regulate interstate commerce and commerce with foreign countries and that forms the constitutional basis for much federal regulation see also Article I of the Constitution in the back matter

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.