Final answer:
The term used to refer to the law that is applicable to a particular legal issue is Applicable Law.
Step-by-step explanation:
The term used to refer to the law that is applicable to a particular legal issue is Applicable Law. It is the set of laws that are relevant and can be used to determine the outcome or resolution of a legal matter. For example, if a contract dispute arises between two parties in different states, the applicable law would be the law of the state where the contract was signed or the law chosen by the parties in their agreement.