The term "minor actinide" refers to a group of elements that are produced as byproducts during nuclear reactions. These elements include americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, and nobelium. They are called "minor" because they are present in small amounts compared to other actinides like uranium and plutonium. There are several synonyms for the term "minor actinide" including "transuranic element", "higher actinide", and "long-lived actinide". These synonyms are used interchangeably in scientific discourse and research on nuclear waste management and disposal. Identifying suitable solutions for minor actinide disposal is critical to the development of nuclear energy that is both safe for humans and the environment.